Malicious PDF — malware analysis report

Static analysis result for SHA-256 3627a07a177d26f1…

MALICIOUS

PDF

43.4 KB Created: 2020-08-04 03:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0cf08893a32757500c7559854db87ddd SHA-1: ebcf6c5edbf1a107ae906a1c610571f274bdd372 SHA-256: 3627a07a177d26f1dbeacfa5ee5d2e66213acaaac5763cd4dcdfd495389bf629
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm or SEO spam campaign. The primary malicious URL identified is https://ttraff.ru/pify, which is used to redirect to other PDF files. While no scripts were extracted, the sheer volume and nature of the embedded links strongly indicate a malicious intent to direct users to potentially harmful content.

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=airliner+world+december+2020+pdf In PDF document text
    • http://files.kissfitnessprogram.com/uploads/1/3/1/3/131379042/xepawusaruzoseso.pdfIn PDF document text
    • http://files.dandelionhousefloraldesign.com/uploads/1/3/1/4/131454373/2751783.pdfIn PDF document text
    • http://files.tubitospizza.com/uploads/1/3/0/7/130740297/22f24.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/1/0433/6202/5624/files/sotelamezotivijagunujilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/4011876156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/79123415902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3686/8762/files/scotts_2000-_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/daronuvixerivaratuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/muregizigosikaxujavat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/73103308271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4942/5823/files/enlaces_quimicos_del_agua.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/sebumufumepuxabifus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/merge_with_adobe_reader_xi.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_off00006be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE4 5408 bytes
SHA-256: 5f43bf7cd90c2598d12ad84e60ea7f8fdd8235580bed41b1462c33432a8f912b
font_01_sfnt_off00007e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E48 10032 bytes
SHA-256: 9ebf0c9aebeaf0c01df9802f08449b76a9b5575aa416a969c0310a0bf5c2ca1f

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