Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f4aa99447ea650…

MALICIOUS

PDF

41.7 KB Created: 2020-08-18 18:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90fc788bd7d63801d40cd6753a01b5b0 SHA-1: bafbba20cfe8af15eca75508dc4389f14a4f463d SHA-256: 44f4aa99447ea650b9ade2661bc8607625b654aca7fa871cee4b3cbb6a5ed993
234 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure containing a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=bts+bbmas+2019+performance+video', is flagged as a known malicious redirector. The document body contains garbled text but includes the same redirector URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=bts+bbmas+2019+performance+video In PDF document text
    • http://powexa.abundancecreativearts.com/uploads/1/3/0/9/130969072/58a6840e3.pdfIn PDF document text
    • http://files.whisperofspirit.com/uploads/1/3/1/4/131453555/wovaluwelidovit-fopajelomal.pdfIn PDF document text
    • http://nulapeji.spartanleadershipgroup.com/uploads/1/3/1/0/131070851/12088daac3692.pdfIn PDF document text
    • http://files.smkluver.com/uploads/1/3/2/8/132813998/8540258.pdfIn PDF document text
    • http://files.santarosaneighborhoodcoalition.com/uploads/1/3/0/7/130775257/kiwog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/povevegilatoruke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/wuditakidewepawiwutubuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3510/6200/files/dikitizogogipefel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/nosode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/bujomupiwizer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/guias_de_medicina_ambulatorial_e_hospitalar_unifesp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/94863263520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/zuxoxigumuvuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/kabivesesaxirono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/werete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3593/0273/files/84935228156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6561/4234/files/96910279445.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55BA 5788 bytes
SHA-256: 85461fa6bcea803373cdb8bdc227885d9c0bbd900918283108803e499806c715
font_01_sfnt_off0000694e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694E 9900 bytes
SHA-256: 05bb8a3e2ebcb7915b8529b96e397a641559ec98325d36c6e138bfd25edac705
font_02_sfnt_off00008b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B37 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c