Malicious PDF — malware analysis report

Static analysis result for SHA-256 b167e9a221857dc3…

MALICIOUS

PDF

44.9 KB Created: 2020-08-21 21:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6586cca26ba3ea84d67d556e6e2761ca SHA-1: c367257cf30202f5416ceffb523b07424787cfad SHA-256: b167e9a221857dc3df48d21f9ee185db83370a2219b83414ed74180a11ffd672
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The document body explicitly mentions 'Valiant Hearts apk data' and contains a URL that redirects to 'https://ttraff.cc/pify?keyword=valiant+hearts+apk+data'. This suggests a social engineering lure to trick users into clicking the link, likely leading to malware download or a phishing page. The PDF also contains a PDF_SEO_LINK_FARM heuristic, with numerous links pointing to Shopify domains, though the primary malicious link is the redirector.

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=valiant+hearts+apk+data In PDF document text
    • http://digaf.jamesekdahl.com/uploads/1/3/2/6/132682229/tixubadapod.pdfIn PDF document text
    • http://nuxumuvir.babyg-lash.com/uploads/1/3/0/7/130775583/1617803.pdfIn PDF document text
    • http://files.adamwilliamchalmers.com/uploads/1/3/2/8/132815791/vilujegol.pdfIn PDF document text
    • http://dubuda.lhsfootball.us/uploads/1/3/1/4/131437906/febakupalim-nuginux-tefivofotizubi-mefutudef.pdfIn PDF document text
    • http://files.just-jane-designs.com/uploads/1/3/0/7/130739658/5366934.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/1/0434/7055/3250/files/duzen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/28992658356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/ashby_material_selection_in_mechanical_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/acrylonitrile_butadiene_styrene_abs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/74491507877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/74579945489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37741658126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/xakezozidugober.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/44096019865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 3500 bytes
SHA-256: ed108e6ae30a418c1a7cc39da3f899c327a08055945ccdf15157bdea122bac26
font_01_sfnt_off00007145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7145 5076 bytes
SHA-256: 7e7640cb75698c42aefc31a828be9daf79ebc8f12dbe632d87d0091cd1946acf
font_02_sfnt_off00008278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8278 10528 bytes
SHA-256: f192af21a7d5ade04c9927d4c1e9ad1c3033c8b8c2c1ea9ab40a7c335a0d9023

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