Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdc7cae81d8aa0d…

MALICIOUS

PDF

38.6 KB Created: 2020-08-09 17:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5db4c2000aa03ef016c91ada602f741 SHA-1: 27652837cbb2ebe91a1f5e264de8df4f634133d6 SHA-256: 7cdc7cae81d8aa0d26893643f3bf98a0fdb292d1ec9d4d0a093fd0eeb6c6a118
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the document is designed to funnel users to malicious content under the guise of providing free downloads, likely leading to further malware infection.

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.com/pify?keyword=amrita+pritam+books+pdf+download In PDF document text
    • http://zubovedu.livehealthywithcancer.com/uploads/1/3/0/8/130814535/1d6637a29dcd.pdfIn PDF document text
    • http://files.bourbeau-voice-dynamics.com/uploads/1/3/0/7/130775558/ziraful.pdfIn PDF document text
    • http://lofodekud.chalmersphoto.com/uploads/1/3/1/4/131407005/3f00db.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/1/0429/3197/8403/files/a_level_computer_science_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/pesajenoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/pre_calculus_11_bc_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/43530761198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0890/7688/files/78941093737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/fish_tank_stardew_valley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/wutokirilirega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/37127855018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/vadif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/st_cyril_of_alexandria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7791/7085/files/ontology_matching.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/pagudogavuvenidelowaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/54702512736.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_off00005883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5883 5472 bytes
SHA-256: 0d374f3532ad6210dc49576ed8673d61e1554508b92d2467ef5f7aa3ac02d16a
font_01_sfnt_off00006b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B12 10024 bytes
SHA-256: 16c1531aab2e96341faf72947012d3ac57b81b425192af048f6d22746d62729b

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