Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39671bf94352cba…

MALICIOUS

PDF

51.6 KB Created: 2020-08-11 19:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53d3b72ca0f8d514e84c2c82753995c5 SHA-1: 9574b7f7ad7295c0cd6431adb529d5eaa55ee122 SHA-256: c39671bf94352cba2f2ddc9b4cd65fc2398b8820a91b8bda1afe33065e886d91
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a direct link to a known malicious redirector infrastructure at `https://ttraff.ru/wb?keyword=hunter%20douglas%20powerview%20hub%20installation%20manual`. This indicates the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

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.ru/wb?keyword=hunter%20douglas%20powerview%20hub%20installation%20manual In PDF document text
    • http://radamulir.hustedappliancecenter.com/uploads/1/3/1/3/131383791/4764591.pdfIn PDF document text
    • http://metop.piecesearlylearning.com/uploads/1/3/0/7/130775045/9dd6f31e28f1d.pdfIn PDF document text
    • http://files.fpcroswell.org/uploads/1/3/1/6/131636845/garunuki.pdfIn PDF document text
    • http://lujiru.emmausbaseball.com/uploads/1/3/1/3/131383314/demibilu-lodenevu-vogixugusunafag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/zitagidas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/nagib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6946/2935/files/fallout_4_5._56_ammo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/94137924395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7641/files/14694559897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2127/7096/files/download_vimeo_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/53205682884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0319/7078/files/tabizupizevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/96713341850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/52556662099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/akutagawa_short_stories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8063/7859/files/5343611400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/95983619389.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000813b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 5628 bytes
SHA-256: 8b784ede5288129986a6378b2c2768103578ebfdb9263898054774cb1684b43b
font_01_sfnt_off0000943e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x943E 10480 bytes
SHA-256: d624db81a5b028c8ec4b79924854cdcfac184b3c669d57bc74e6935b682894a9
font_02_sfnt_off0000b813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB813 2072 bytes
SHA-256: ee6caf5c4d7e20332ffe378fa753575f367958d7c47282a8af2139850001bbe6