Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0130acf0894c97…

MALICIOUS

PDF

53.6 KB Created: 2020-08-07 14:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 181892c5f6feee40b86d809b90d1c221 SHA-1: 6f27532ce081ca8479222a2ab83b845f4a17f0c1 SHA-256: ca0130acf0894c973c2b99d7352e582b6e3bddfbaa9554a168fc876a8c06e830
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely serves as a gateway to a phishing or malware delivery site. The document body itself is largely unreadable, but the presence of the malicious URL within it suggests a lure.

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.com/pify?keyword=allegory+and+representation+pdf In PDF document text
    • http://files.jazzstylez.com/uploads/1/3/0/8/130874143/812480.pdfIn PDF document text
    • http://files.calhouncounty911.org/uploads/1/3/1/4/131438234/cbac4d3d0a4.pdfIn PDF document text
    • http://files.jordanpearsonalive.com/uploads/1/3/0/7/130775768/pasorujivevapada.pdfIn PDF document text
    • http://files.kristinapham.com/uploads/1/3/1/0/131069934/6809239.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/1/0428/9275/5111/files/45098311085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/6390220106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/potexalomol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/zizexuluguxelopoxonanal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0708/0608/files/nogumafaguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/bakokofam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4195/6775/files/cracking_the_coding_interview_book_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/18686024688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/80706110088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0894/1467/files/cpc_exam_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/a_to_z_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/69058782186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0757/4179/files/7475263874.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_off00008e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7B 5300 bytes
SHA-256: 41ecb54019590e7209602fef84d2abd905dec5e14a241e36d1a3c6e0e75faa86
font_01_sfnt_off0000a09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA09A 12532 bytes
SHA-256: 772d6516e2c493d147a623fddeaef44a44f8a8f8da8cfc54e7508ad8cd357b03

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