Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c5dfc636b4c5ae…

MALICIOUS

PDF

43.7 KB Created: 2020-08-04 17:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b0dddc6121f85debedb30c8f41194ed SHA-1: a0ace5134b4196e2e9966b623226ecf6e04e2bcc SHA-256: 42c5dfc636b4c5aec9488a3909d3c507201a87b618265e287ec9276888924337
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=describing+people+s+appearance+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and other embedded URLs, reinforcing the malicious intent.

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=describing+people+s+appearance+pdf In PDF document text
    • http://files.camberleyguestaccommodation.com/uploads/1/3/1/6/131607683/1e84be9.pdfIn PDF document text
    • http://files.enseaadvisory.com/uploads/1/3/1/4/131453989/3407623.pdfIn PDF document text
    • http://files.absintheaccessories.org/uploads/1/3/0/7/130739826/3b851e6543.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/1/0437/5052/3029/files/biblia_catolica_para_jovenes_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/moxevukon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/22673364575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/65363172265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/38084187714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0654/8377/files/ds2_twinkling_titanite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6682/6656/files/pezerob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/sonny_ericsson_w580i.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4154/9462/files/direct_selling_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/wejumajizogarox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/morse_code_alphabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/57942778550.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_off00005fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA1 5168 bytes
SHA-256: 392224d2062f330a9550d7fa8f5d797d394e620b27ac9c3bcea7d8d5fb555255
font_01_sfnt_off0000712a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712A 10136 bytes
SHA-256: 7559f497e3019cc0027ab074d3ed3a5dfbf942d9df4b246a588436e5ffc4b8d4
font_02_sfnt_off000093e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2