Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a74e199c44edf77…

MALICIOUS

PDF

41.7 KB Created: 2020-08-27 22:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ccdfe83f0e31f3c013040380fe3ba9d SHA-1: ecd52ee75a325ed0f58a3dec0231f69b61f4f0b9 SHA-256: 3a74e199c44edf7777e49d74606d639b1610b11e7654d00dc45a9b440a9e5c5b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a prominent link disguised as an IELTS preparation PDF download. This link redirects to a known malicious URL, ttraff.cc, which is likely intended to deliver a malicious payload or redirect to a phishing site. The document body contains obfuscated text and the malicious redirector URL, confirming the lure.

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.cc/pify?keyword=makkar+ielts+general+writing+task+1+pdf+download In PDF document text
    • http://wixapakad.blueskytherapy68.com/uploads/1/3/1/6/131606490/708553.pdfIn PDF document text
    • http://files.oregonbda.org/uploads/1/3/1/3/131380469/betalirezubeki_gemaga.pdfIn PDF document text
    • http://files.lacuralifestyle.com/uploads/1/3/0/7/130738919/6d71d15ffc0.pdfIn PDF document text
    • http://bexifid.aberdeennaturalburials.co.uk/uploads/1/3/1/4/131438729/mirilubagili.pdfIn PDF document text
    • http://ferugog.creativefoodart.com/uploads/1/3/0/8/130813710/7939857.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/1/0435/8252/1503/files/57532379638.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/7340/5856/files/34850171098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1473/3480/files/vizumovugokolifota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2187/6900/files/tagowol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/15260491111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0754/8326/files/remove_git_add.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/74746754361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35209966956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4215/8245/files/fanopus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/90451499425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5108/8032/files/aromatherapy_massage_techniques.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 4

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_off000064a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 5420 bytes
SHA-256: 1a9a168e1b0e690e0e8b7607a477707d761836e38e58cb44b5f9d48c14d1d508
font_01_sfnt_off00007748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7748 10060 bytes
SHA-256: 3562ed09db766ed2889f4c3539a7c8ee2b6bbe53e5e0047f506b82ed0050ea20

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