Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1e062516bb4543…

MALICIOUS

PDF

38.8 KB Created: 2020-07-31 17:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2e6045b1b9020a8990f3395592a2064 SHA-1: fe1079a3a983afeaf99c2b75e948d729843cb9a2 SHA-256: 9c1e062516bb4543452c0c93da2da0a9d38b306e665eeb3c969b2f1239cb19f6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though corrupted, suggests a lure related to a 'solutions manual'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

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=principles+of+modern+chemistry+solutions+manual+pdf In PDF document text
    • http://files.blancacabreravera.com/uploads/1/3/0/9/130969656/degibaf.pdfIn PDF document text
    • http://files.thehammerandanvil.com/uploads/1/3/1/1/131163666/fopejot.pdfIn PDF document text
    • http://files.sobukai-estonia.com/uploads/1/3/1/4/131483719/a720524460fab.pdfIn PDF document text
    • http://files.americanfoursquare.us/uploads/1/3/2/7/132740218/majibomavapakabopi.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/1/0427/7485/5846/files/26399577421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/pupafazeziluxeguvuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/25986250362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/79800300633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/76218838493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4433/9861/files/waxenamovulinugezururuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2139/3320/files/nesibutaderonol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0674/6011/files/lupumuzef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/13568789375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wijabogose.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 8

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_off000055fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55FA 5496 bytes
SHA-256: 4ab83d32d50565bf552573cabf7e77dffd12d608445babebe6bf7d6d2cf2fd31
font_01_sfnt_off00006885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6885 10584 bytes
SHA-256: 78c1d9e4f0aefa070ec530e97f310297e338e219a1b0e70f866b696d60948c5a

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