Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbbcbd0867569e0…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 04:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54f3174ccc9c6aa22959ff55de57c206 SHA-1: b5c2670716dfe160988636d451a32300316dc324 SHA-256: bcbbcbd0867569e05dcdffc4aad65b51028dd80417d9f388bfa62e8516e00f53
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=inequality+questions+in+reasoning+with+answers'. The document body, though heavily obfuscated, contains this URL and other Shopify URLs, reinforcing the lure. The primary attack pattern is to trick users into clicking these links, leading them to malicious infrastructure.

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=inequality+questions+in+reasoning+with+answers In PDF document text
    • http://files.servicesgoglobal.com/uploads/1/3/1/3/131380467/4725000.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/1/0436/6221/3273/files/60615352659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/rufupopefavaxotulilod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/keledaroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/95921189996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6083/0111/files/fuxaxakaxagenuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/fibojanad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/43367247704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/bogaretusatosibafevirex.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
🗂 Part of campaign: janethunter.com 6 samples

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A8 5204 bytes
SHA-256: c5fc69330546ea6f7e4a723710ed1e98f6eb36009729ed611a0b5d9d593bda74
font_01_sfnt_off00007265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7265 15424 bytes
SHA-256: df0174c157d63108791e9a30a11063bfbfc82efdd66a14f96b7e2156380b39fd

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