Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40e88f8979c6316…

MALICIOUS

PDF

41.7 KB Created: 2020-08-17 00:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2d67cf990bfb2257fb23cace98d38e03 SHA-1: 7e4c46ef7d1b356a09ccd62331ac0899497b097f SHA-256: c40e88f8979c6316e87643d0eacb6a5aa0fc36b4d5a7c26bbac50fab770cd412
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, disguised with a search query for 'Google android sample source code'. The document also hosts a large number of external PDF links, many of which point to Shopify domains, likely as part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=google+android+sample+source+code In PDF document text
    • http://tuzone.raoulpacheco.com/uploads/1/3/1/6/131606289/7720049.pdfIn PDF document text
    • http://rujorizef.historic-wabana.com/uploads/1/3/1/3/131383737/4cbe0.pdfIn PDF document text
    • http://xagituw.chuckschaefferband.com/uploads/1/3/1/1/131164250/sodep-nikuvuxa.pdfIn PDF document text
    • http://files.loveburley.org/uploads/1/3/1/4/131455463/nugubelezuromunug.pdfIn PDF document text
    • http://files.ueshirofloridakarate.com/uploads/1/3/1/4/131438038/xenug-gofukerovose.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/1/0433/7706/6135/files/gujarat_atlas_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/mepafevunomarinalaxupuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/kolujax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/4700472325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/22549367237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5235/8039/files/79470316944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/vututujeluzabasojomelil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0260/0356/files/vizujumunotozexiderebix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3809/7051/files/8068683552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/74156064234.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 3

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_off00006496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6496 5424 bytes
SHA-256: 5be87969f16c9fc78114fa109bd867e8b0e899216b209c69ae1e5ba47a653f1b
font_01_sfnt_off000076f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F5 10232 bytes
SHA-256: 3538d2d92008991b74d476b53c9aed9d495daef23775450a2c00ae1f4d543280

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