Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cfa89ce3c4da18…

MALICIOUS

PDF

34.4 KB Created: 2020-08-20 20:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae4cded75f58a34d25f9ab0c5d41f99a SHA-1: 63a055daf01f3c14f094b68fac87579a34c3bb49 SHA-256: a1cfa89ce3c4da1870c14181dead54513ab4f0f7ca37bc68c3ecbb0b45183fc7
202 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with 30 external PDF links detected. One URL, 'https://ttraff.ru/pify?keyword=initials+logo+template', is flagged as a malicious redirector. The document body contains generic text and what appears to be metadata, but the primary malicious activity is driven by the extensive link farm, likely intended to manipulate search engine results or distribute further malicious content. No scripts were extracted, and the document body does not provide further context on the specific lure.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=initials+logo+template In PDF document text
    • http://files.thekirkoscaravan.com/uploads/1/3/2/8/132814929/puvubesik.pdfIn PDF document text
    • http://rejawusej.gordonpicken.com/uploads/1/3/1/3/131398232/1411591.pdfIn PDF document text
    • http://nefujo.fashionspeaks.net/uploads/1/3/1/8/131856166/81317657fadde28.pdfIn PDF document text
    • http://wikizu.alexandriaponce.org/uploads/1/3/2/8/132814930/9747245.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/1/0430/8844/5604/files/very_hungry_caterpillar_printable_coloring_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1349/7247/files/english_bond_in_brick_masonry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8858/0512/files/kojub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/2569034418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/report_folders_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/dunidagikos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/woxolozokavokoxareveluleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/wexajonuvamodisituxowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/79112851848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/accrual_and_deferral_configuration_in_sap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A85 4980 bytes
SHA-256: b57178cec6f35020055dedf6f0b8d9bd5c81d36479501c53f0bfd6a4489d988a
font_01_sfnt_off00005b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B62 9856 bytes
SHA-256: 3db68be5d8060138575a5fd245a9331b703a1deee19de42c6d4c6227639fd768