Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6c5bfe37e71732…

MALICIOUS

PDF

41.9 KB Created: 2020-08-01 08:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e300af62968d1fe30f3c313ed87dc0d4 SHA-1: ae39e3b3fd8c2065bdd8f35d83bd0b9a2316f8b0 SHA-256: 4b6c5bfe37e7173200feb631a10d38a61a108ebcac394eb88965ecc0367aaeb8
234 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users into clicking on what appears to be a guide. The primary link, https://ttraff.ru/pify?keyword=wow+classic+engineering+leveling+guide, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL, reinforcing the malicious intent. The ML classifier also strongly indicated maliciousness.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.ru/pify?keyword=wow+classic+engineering+leveling+guide In PDF document text
    • http://files.brianalea.com/uploads/1/3/0/8/130873810/14fd1a8a8719.pdfIn PDF document text
    • http://files.koreanamericanhealthconference.com/uploads/1/3/0/7/130738614/waxokezapivola.pdfIn PDF document text
    • http://files.altswatch.com/uploads/1/3/2/7/132740700/7769127.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/1/0439/5014/5704/files/sesax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/25294542097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/43116174851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9265/6799/files/24504430982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/battlefront_2_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0152/0029/files/gazisef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/16642932255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/jeroginupetadufok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/57270879742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/makanupoxajijomiberowajan.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 6

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_off00006643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 5272 bytes
SHA-256: 9d5cb4412391c32b459e2aafc8becd3ca05259c9195912510504898e4fece1cc
font_01_sfnt_off0000785a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x785A 9968 bytes
SHA-256: bc5beaba34ef459ca3111aa53601d60ce8865a45218cd528310b400d30981808

Open this report in the interactive analyzer, or submit your own file for analysis.