Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c390ce74d8400a8…

MALICIOUS

PDF

107.4 KB Created: 2020-07-31 23:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 42f1d3568d7c6d50c5e4d388ad9426e8 SHA-1: 43fe44aa56e461130e6d0a29dae5fe03714c431b SHA-256: 8c390ce74d8400a8ab8223158ba7dd598aa48251a547fa7159222a79c89e4c8f
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=nikon+wu1a+manual'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs hosted on various domains, including cdn.shopify.com. The overall intent appears to be directing users to malicious infrastructure under the guise of providing a product manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=nikon+wu1a+manual In PDF document text
    • http://files.runningembers.com/uploads/1/3/1/4/131407818/1e8033.pdfIn PDF document text
    • http://files.nicolefranz.com/uploads/1/3/1/6/131607269/7880543.pdfIn PDF document text
    • http://files.spicecommunity.org/uploads/1/3/0/7/130776809/3104681.pdfIn PDF document text
    • http://files.neonfactory.ca/uploads/1/3/0/7/130740130/rikoxanujuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4655/1208/files/bizumunewakezigagazabozug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/44251251777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5081520916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/36416418428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/rovexadereketur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/66044594410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/lalol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/28122928192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/12672787491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/vokevezufabi.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 33252 bytes
SHA-256: d2cd280d42aa80892ee071a99219f62ea450d2efc929c3dbf18730c148ebcec7
font_01_sfnt_off0001543a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1543A 4416 bytes
SHA-256: 1dd6cc3004a4d21ad6748dc139736f4a1b6c734a16d049f8a26c6a7df99bb7e9
font_02_sfnt_off00016328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16328 14696 bytes
SHA-256: c971d817e8eed9b12230ae0b5d353ba96284ec06b388adb3ebb771c0f64cfe14
font_03_sfnt_off000191e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191E3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e