Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4c3137e8b6105e…

MALICIOUS

PDF

47.2 KB Created: 2020-08-18 13:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a7d755a71f03127232141269c8e29bf SHA-1: 8c517af3fa5e6a60f3c46335cbe1fb3ca8790f4c SHA-256: 8a4c3137e8b6105e873006146475340737fbc77bee0e2ead9ba9ac8df898eabc
234 Risk Score

Malware Insights

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

The PDF document contains a link farm and a direct link to a known malicious redirector. The document body text, though heavily obfuscated, contains the string 'Counter strike 1. 6 warzone hack free' and the malicious URL, suggesting a lure for users interested in obtaining unauthorized software. The presence of a password archive lure heuristic indicates that this PDF is likely part of a multi-stage attack where the actual payload is encrypted and delivered separately.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/pify?keyword=counter+strike+1.+6+warzone+hack++free In PDF document text
    • http://files.yardandgardenserviceshamilton.ca/uploads/1/3/0/9/130969370/komumuzilozozevajulu.pdfIn PDF document text
    • http://wiboxa.duncanranchwhitetails.com/uploads/1/3/1/8/131856380/womidututob-dukinudeduzu-zejukiwiledejad-fijemadumunag.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/1/0434/3519/6566/files/negezimosob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77439678162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/sufifuvapoxitusuxezis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/27626181701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/wugijazuvakuvolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/aloha_soft_sheet_set.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/fuxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/ludefexirotoriri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2956/9434/files/latest_technology_in_computer_science_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/82048279575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/8877150112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/41169403867.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 1

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_off00007596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7596 5284 bytes
SHA-256: a1422caf02c6ef2964421090ab0ac3a062f00c875f2d77068b925cbfaf5d8a0f
font_01_sfnt_off000087b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B3 12456 bytes
SHA-256: 64c6bf3e0689437208c9d15e80f5fcd3484a41ee1c5df786107fccce4029f65d

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