Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6121eb55304712…

MALICIOUS

PDF

54.7 KB Created: 2020-08-09 02:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 386ffcc7c625539c3d98ae957dfaa938 SHA-1: 793a9f6698e0d6fdde6263893f46fc20bb22e7e0 SHA-256: 8f6121eb5530471229c16801fba3ed23b785414b4365b6396016795f881e137a
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to click on these links, which likely leads to a phishing page or malware download. No scripts were extracted, and the document body was heavily obfuscated.

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=stomatal+density+pdf In PDF document text
    • http://files.andrewshainker.com/uploads/1/3/1/4/131407493/mejowubosalil-lodoro-gizatafujipo.pdfIn PDF document text
    • http://files.coffsharbourmassage.com/uploads/1/3/1/3/131380058/xivaf.pdfIn PDF document text
    • http://files.bradleywilliamsart.net/uploads/1/3/2/3/132302910/rofulasamolisax.pdfIn PDF document text
    • http://files.realenglish-online.com/uploads/1/3/1/4/131453171/migoxofomufesugog.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/1/0427/4490/5884/files/mikevulurofexozux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/45107527940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8939/3816/files/fifth_grade_math_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/fowatuzinilifitomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/joana_s_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/33604542930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/98514341120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/4352980124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/fekelil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/94402520960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0688/5020/files/www._starbucks._com_card.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_off0000965b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x965B 5296 bytes
SHA-256: 3be541c61d76e97780145ee214f58e3e19b1a923c6d81fe29e3f08f1ffd7b13c
font_01_sfnt_off0000a857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA857 11064 bytes
SHA-256: 059c74c4f30aa9b31d97e56dd954402c9e5bfeb5a0269272905734a0fcf14466

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