Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7d3b612327fb87…

MALICIOUS

PDF

114.2 KB Created: 2020-08-21 15:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5fe15b1d250a29369b2d13bbbe9690ac SHA-1: 2a35edc167c543121c1d63d772d2c49441406db5 SHA-256: cb7d3b612327fb87745370dbf32489bde161db2f1c5e0589c78761ea6e3c6db4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, limiting the analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=history+of+armed+conflict+pdf In PDF document text
    • http://files.arvadatherapysolutions.com/uploads/1/3/0/7/130739892/546138.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4375/6954/files/jilusekevasutezitudosubaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/dapuzuruxosivosobuzab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8104/2839/files/colombo_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/70531234627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5586/5243/files/bumekuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6368/0932/files/elementary_numerical_analysis_atkinson_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8455/4135/files/lipizune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/45932706393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/nimokeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/momum.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 1

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E84 8596 bytes
SHA-256: 0f1cab8d2d9edcbbf0d4c8573183005a17fed3e629e93f224dca7f4ea5b58ef1
font_01_sfnt_off00016acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ACD 5152 bytes
SHA-256: 66156bc62321a8390f738c9c69271d8cadc662a9aefa2160f69f5973256512ef
font_02_sfnt_off00017c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C36 15792 bytes
SHA-256: 3b127509577cc39dc010ca14a361846a9d14b65f3193e028dbf5bcb8bae235db
font_03_sfnt_off0001acf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACF0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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