Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0374c372f708faa…

MALICIOUS

PDF

35.3 KB Created: 2020-08-25 16:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4bb2139c11f12b493fe8ab7001e52a0 SHA-1: ba06563e8414b149f66a5d9841f252985cbfefe3 SHA-256: f0374c372f708faa49e79b34a3b1ca12fe68ada35db4dd43cb5a00c73f3e9a09
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to other sites. One of the primary links, https://ttraff.ru/pify?keyword=geometry+rotations+worksheet+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to academic worksheets, likely a lure to encourage clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/pify?keyword=geometry+rotations+worksheet+pdf In PDF document text
    • http://files.shipleyartstudio.org/uploads/1/3/0/8/130873738/pirodi-purirexepo-sotubifav-wavilolujufuna.pdfIn PDF document text
    • http://files.amandatriplett.com/uploads/1/3/2/6/132695915/7030463.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/1/0435/4103/7208/files/aldosterona_funo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4453/files/31337280594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4598/4158/files/liquidez_bancaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/xetabakosebakurexezozoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/kalaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8951/7978/files/ret_pally_icy_veins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/wikejoxukupozitovusewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/wotuj.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CBC 5536 bytes
SHA-256: 0cd28de70ab0a500ed876d17c6c81fa01dcebf9559d0bdf3ce6e3587ab6b49f6
font_01_sfnt_off00005f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 9692 bytes
SHA-256: 420d17d5a8e07e2efdcca2cc10ebf134353b910a73241139da7ddc68159bf99d

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