Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a3531d0157f599…

MALICIOUS

PDF

47.0 KB Created: 2020-07-30 12:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 976bab0265c0a73fe8c55bff65f38991 SHA-1: a2deffd7eeb67172df947baf860fe353777f5a5f SHA-256: a8a3531d0157f5992608a6253f0476f57d66507e1173591c143b85786c5aa79e
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a tutorial book PDF. The link leads to a known malicious redirector, which likely serves as a lure for further malicious activity. The PDF structure and embedded link farm suggest a phishing or social engineering attempt to drive traffic to malicious sites.

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=autodesk+maya+tutorial+book+pdf In PDF document text
    • http://files.mariposaband.com/uploads/1/3/2/6/132695525/tojewakop-rulirazuwiw-rurote.pdfIn PDF document text
    • http://files.tusamalaysia.com/uploads/1/3/0/8/130813782/6464224.pdfIn PDF document text
    • http://files.westwoodmun.com/uploads/1/3/0/8/130873781/gajotagigexuko_novukonipegemub_xabuguv.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/1/0440/2174/3781/files/purozezabimimimupis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/gezojeturijumurevuresem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/49532553479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/dawofeladogapegoxete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/19240527990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/7414661610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1320/0282/files/sovajuwiviloliwekupawono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/12728042124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/gofasiteran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/pokolotomibegijipalinat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/13776528521.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 5

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_off00007ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE4 5256 bytes
SHA-256: 375b10eff9b372fc3e531f85ee9d6396bc0f9cdbd51c0ce88b8359aed3afc756
font_01_sfnt_off00008ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCD 10076 bytes
SHA-256: 7614f4e16dd5147a475aae312884cc08b89a7f90079b4c7326528441efb37523

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