Malicious PDF — malware analysis report

Static analysis result for SHA-256 528315b4856ad928…

MALICIOUS

PDF

94.8 KB Created: 2020-07-29 05:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1418d8474fac18a60bad5dba216f3558 SHA-1: 19a240f5fae17b1979ecbdf3bd3ff8e10cea06e3 SHA-256: 528315b4856ad928f99064ecaf93a9ec4d5b0de9a621a824de2168b833efa1c5
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com). This suggests a link farm or phishing attack designed to direct users to malicious sites. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to 'Apa and mla format', likely a lure.

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.com/pify?keyword=apa+and+mla+format In PDF document text
    • http://files.humananimalbondtrust.org/uploads/1/3/2/6/132695741/4324837.pdfIn PDF document text
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdfIn PDF document text
    • http://files.johnpconoverphotography.com/uploads/1/3/1/3/131378990/didujen.pdfIn PDF document text
    • http://files.assertion-evidence.com/uploads/1/3/1/6/131607066/nogisizedol.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/1/0429/8145/8069/files/dalupus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/kifopodomizunokaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/zosurozukosuwubekese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/xagokizuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/78602509851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/nutuwuvimajof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/lusezawubotobuwepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9477/7757/files/disajurukonetumisifik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/53611046579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruketisoren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/7996106750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/30254973874.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_off00013aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEC 4620 bytes
SHA-256: 5cab83f726c7a564add9e3845b942292d4c911e5965381846f9c972c5dfb6a4a
font_01_sfnt_off00014a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A76 10376 bytes
SHA-256: bab2a00656bab6ee46267d1773774dff7e953fd44bf695bc309fa8f578f73b4f

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