Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74ba058f3891f32…

MALICIOUS

PDF

49.3 KB Created: 2020-08-11 16:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28df0453a91e96ec270d6aab7c93d150 SHA-1: e8bc9881f8597fbec23466d6676dda760e7f7b69 SHA-256: f74ba058f3891f323a6bbe9bd77b291e2752c871d7f41ccce413b7ea3c7c9e40
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=az+100+exam+questions+pdf'. Additionally, it exhibits a PDF link farm behavior, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body, though partially corrupted, suggests a lure related to 'Az 100 exam questions pdf', aligning with the 'SE_INVOICE_LURE' heuristic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=az+100+exam+questions+pdf In PDF document text
    • http://files.oakshealthieryou.org/uploads/1/3/0/7/130738631/743386.pdfIn PDF document text
    • http://vukuso.leeannevernon.com/uploads/1/3/0/7/130776436/3236701.pdfIn PDF document text
    • http://files.shannonqiriarte.com/uploads/1/3/1/4/131453111/ab578fea4c5d6.pdfIn PDF document text
    • http://files.playalamision.com/uploads/1/3/0/7/130776602/tenizumomojekegisi.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/1/0427/6181/4172/files/english_vocabulary_words_with_meaning_in_arabic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/43303804239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/naxivoropenixad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/antecedentes_del_aprendizaje_significativo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puxatofutedixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/zutikojiwokumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91428743782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/the_natural_history_book_dk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9418/0001/files/93731609790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/catecismo_menor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/vofulebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8922/2045/files/gobupisizara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/badabufebumajisatux.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3A 5484 bytes
SHA-256: ef6189f0f1a8c5dfc13e811b90a1a88d35dad4f05eec2cc3b1b21bb8b2cb2646
font_01_sfnt_off00007ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE2 11172 bytes
SHA-256: d3a498d6a65680927b8780443ff8cfaf49fcecce59fe71529a635219ec99c94c
font_02_sfnt_off0000a318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA318 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b