Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7f266b3b6691ba…

MALICIOUS

PDF

87.2 KB Created: 2020-08-13 01:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0713faa502f972205156083da4aa720 SHA-1: 99a84891c3ed74dc5e30dd39dbe98bc952c5a686 SHA-256: 9a7f266b3b6691ba53eae0958b67c1a47433881f3d122defc2246a92353317c0
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.cc/pify?keyword=cell+culture+techniques+book+pdf, is designed to lure users into downloading a PDF by disguising the link as a book title. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the phishing attempt.

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.cc/pify?keyword=cell+culture+techniques+book+pdf In PDF document text
    • http://dafaxoxog.pietowndesigns.com/uploads/1/3/1/6/131607131/d9e8ce568.pdfIn PDF document text
    • http://files.cr8blk.org/uploads/1/3/2/6/132682868/9848452.pdfIn PDF document text
    • http://lunotufes.customfitc.com/uploads/1/3/0/8/130814017/2346431.pdfIn PDF document text
    • http://files.murphysheanon.ie/uploads/1/3/0/7/130776263/wanarumogovabano.pdfIn PDF document text
    • http://betaninij.asampoh.com/uploads/1/3/1/3/131380845/futinurebeveteket.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/1/0433/8850/2174/files/bisunefukikiwiziviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/63070355828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/cuaderno_para_aprender_a_leer_y_escribir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0754/8326/files/wei_wu_wei.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6158/2741/files/liloni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/juwefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwofomakilaxenifotet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/viluruzefoluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1359/3499/files/33360680859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/14987004741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/dojuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/lorugozunoxarovofubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/fotemizudomijarebubovizos.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 6

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_off00011afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFE 5268 bytes
SHA-256: 9d4fa12e8442e61058d9af34bf060373e7c1d6d2dd8241347f16718c6f69b6c0
font_01_sfnt_off00012ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCC 10180 bytes
SHA-256: 78156c57640c8f5301747c374fea0dc2f2d4722337c535312c61efa20d84cf82

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