Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72c07c88f71b949…

MALICIOUS

PDF

42.6 KB Created: 2020-08-13 22:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 158b9ed6253664a7f1b73ff68ee4ea53 SHA-1: 4054a47d1913a576a96cc4cee91e5dbd6b78ef31 SHA-256: a72c07c88f71b9492b818b6e2fccb33325d4b57d0af143cbe5a1a3a77911fea2
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link pointing to a malicious domain, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=printable+preschool+feelings+worksheets, which is flagged as a malicious redirector. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute further malicious 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=printable+preschool+feelings+worksheets In PDF document text
    • http://pujabiped.motorcyclespeaker.net/uploads/1/3/0/7/130776791/945c67.pdfIn PDF document text
    • http://kutug.ohioarea14.org/uploads/1/3/2/6/132683071/xufuparevugupi-gozalesafotusab.pdfIn PDF document text
    • http://files.rubrecordings.com/uploads/1/3/1/3/131383977/105562.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/1/0433/0687/7080/files/pejodogidevetakuranuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/48173490568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2598/8757/files/70787314315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/mamixadidobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/automatic_differentiation_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7405/files/business_proposal_sample_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/80154575775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/bharathiar_university_distance_education_mca_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/best_tweaks_for_ios_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6208/4262/files/panodelib.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 2

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_off00006814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6814 5576 bytes
SHA-256: 14b4bd385b32bd04a57c8ec47826ea72e1d15409f65e88f42b70121a00b520a1
font_01_sfnt_off00007b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0D 10060 bytes
SHA-256: 7dc22575e04f33b0cf5731f7c0cd0bf0ecfeb6aa248ceda0f28791be03e1998d

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