Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ae0707f346e35e…

MALICIOUS

PDF

37.8 KB Created: 2020-08-11 17:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0dc53dd14585621c832e49bff46f2c4 SHA-1: e38bf627f9bf424d73a02d85e8419c6ade421a37 SHA-256: b1ae0707f346e35ec2733f8d98f65dcc5fea7f3f6e24547f939c3702c7c8c876
202 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is an 'answer sheet pdf free' and includes the malicious redirector URL. This indicates a social engineering lure to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=answer+sheet+pdf+free In PDF document text
    • http://files.rollepodiatry.co.uk/uploads/1/3/1/3/131382274/326971ba673848.pdfIn PDF document text
    • http://files.cvhsmusicals.org/uploads/1/3/0/7/130739154/vuvumuk-luroseb-furagefur-megufulipaj.pdfIn PDF document text
    • http://files.thematic-learning.org/uploads/1/3/0/7/130739625/344659459.pdfIn PDF document text
    • http://files.debbieclaxton.co.uk/uploads/1/3/0/7/130740363/7e80d2ea8.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/1/0427/5827/5238/files/88886314607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/33082952565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/merosiletulomefil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3762/0381/files/absceso_apical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/20474615007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/sulaniriwig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/38650374951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2441/6931/files/40352979946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39806276645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7654/9798/files/90116415838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8841/9741/files/11767661511.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_off000056e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E1 4968 bytes
SHA-256: 6e28c63954ac670113e49f580e9319be6436efb79994de187388d7f53efc4878
font_01_sfnt_off000067d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D5 10164 bytes
SHA-256: 792e640854b3b5637f4757d01f603ca8f0a30827116a0d699b2862310bdfb5c9

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