Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5b515773a089f0…

MALICIOUS

PDF

39.6 KB Created: 2020-07-31 23:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4484f69232c0f94d57e3ff952918d149 SHA-1: 1fe806f311c947e0b28aa71ccf082b30c520abc6 SHA-256: 7c5b515773a089f0e3cadbb858483bc38b665bf48349cfdc972cd2b32f18b908
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. The document body text, though garbled, includes the URL 'https://ttraff.cc/pify?keyword=stihl+041+specs', suggesting a lure to download specifications. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=stihl+041+specs In PDF document text
    • http://files.iwagy.org/uploads/1/3/1/4/131407281/rodibapipoxe_fojilejifetisi_kovorozunitoxa.pdfIn PDF document text
    • http://files.cparkermcmullenbushman.com/uploads/1/3/0/8/130874477/33c6daf18db19d.pdfIn PDF document text
    • http://files.thepeoplesroaster.com/uploads/1/3/2/7/132740836/jiliwixov.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/1/0434/6786/6265/files/54100482009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/63234259675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/nilejitomewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/vuxaxuvuruvoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18608783112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7334/6472/files/45265920268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/jarasitenuxifoveg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/mipikaluxumad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/kaloluvamitifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/67686760974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/sikowixuzasuzebezalod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/tuvawoditibomuxedawomebux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/bisumerifutogiriwilaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6513/0658/files/nagapoziwodo.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_off000051e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E6 4672 bytes
SHA-256: e6adafdf9cbafae583bf98070df8e1304d73a0addc8dfa42c45b065b72dfdb54
font_01_sfnt_off000061d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 9840 bytes
SHA-256: 3e73ba3c4ca2db4ed0519f11dadf23eab4800dfbc6615010da60f25005206bfb
font_02_sfnt_off00008378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8378 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333