Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c873d4a2da52e6f…

MALICIOUS

PDF

35.1 KB Created: 2020-08-12 10:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d67b1123c2a903f5a560486ebbfd96de SHA-1: 8311a578a86cbcb6c77ff5512d0c2ce67b5c02b6 SHA-256: 1c873d4a2da52e6fc19b0d5ea011319ef62be679b364b1a35b1aa150b1cbf7b5
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a document about fire alarm systems. The PDF also features a large number of links to external PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated 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.com/pify?keyword=difference+between+conventional+and+addressable+fire+alarm+system+pdf In PDF document text
    • http://files.weesewoodgems.com/uploads/1/3/1/6/131637714/2848233.pdfIn PDF document text
    • http://files.ftmobile.com/uploads/1/3/1/3/131380895/xixivewe.pdfIn PDF document text
    • http://files.campcenterstage.org/uploads/1/3/0/7/130739590/ginaj.pdfIn PDF document text
    • http://files.boxboardstheatre.com/uploads/1/3/0/7/130740443/tugisoveroro_figimapapanat_jogab.pdfIn PDF document text
    • http://xiwog.100careertips.com/uploads/1/3/2/6/132682787/5460472.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/1/0429/5517/8150/files/xilopoxuxufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/sejarah_asia_selatan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/dufizitezu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4052/8792/files/44107686125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5581/6608/files/wedding_program_thank_you.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/xanupegizekutofowow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/basic_synonyms_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/8_854E-_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/waxuxemufifikegukejiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/68428854691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/79663717079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/jitegugamitovosotilef.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 8

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_off00004c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0A 5692 bytes
SHA-256: c2aa7d91e050a22b27cd6f3dcbde63506c61e0426bae54d2f359b2a946fa2525
font_01_sfnt_off00005f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F67 9164 bytes
SHA-256: 1b540bd13a6c21f1a038c905ca1bc095db08f17c12811931d045265e1d6a4bcf

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