Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7dd6601f2a60cb…

MALICIOUS

PDF

34.4 KB Created: 2020-08-22 00:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4e80bebce68b5163bcb55fc65d11c1e SHA-1: f91107338a6f49ca363d44968d5a09c07eb1f6ce SHA-256: 7f7dd6601f2a60cb8e37f8650663c9fb686379d5faa82e26eda3f829d81a61a7
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links, including a malicious redirector at 'https://ttraff.cc/pify?keyword=cgp+ks3+maths+answers+online', which is designed to lure users to potentially malicious content. The document body, though heavily obfuscated, contains references to educational materials ('cgp ks3 maths answers online') and includes URLs that appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=cgp+ks3+maths+answers+online In PDF document text
    • http://files.blackhawkrailwayhistoricalsociety.org/uploads/1/3/0/7/130739032/zexijibevakovu.pdfIn PDF document text
    • http://bewuzipek.groovespirit.com/uploads/1/3/0/8/130873851/7202571.pdfIn PDF document text
    • http://files.caraleemath.com/uploads/1/3/2/8/132815924/5b1431fe3be.pdfIn PDF document text
    • http://dugezo.schiltec.com.au/uploads/1/3/0/8/130873825/bituzumomuliza.pdfIn PDF document text
    • http://zapokiru.bookkeeperlady.com/uploads/1/3/2/6/132695306/binexodoxiwixub_xazutefareva_vokunisuvirev_zudiluvisebeses.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/lujitelorazoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/inside_man_full_movie_300mb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9966/9151/files/berakixatudasom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/biogeochemical_cycles_webquest_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/musekojor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7448/6421/files/cnc_turning_programming_fanuc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/jefejopozugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/gangster_scene_song_djpunjab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/nufijixumebidutitesuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/20344658637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/8267/2278/files/furthermore_book.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4928 5460 bytes
SHA-256: 924210b2a004c89fe88484184750287ba57b2bdb1704cf31eb986e1f25bc081f
font_01_sfnt_off00005ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA8 9732 bytes
SHA-256: a5182dab8ce555d0fa456466ee56658184942ab4f5acc8e9a019c7a2806c1ba9