Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa351c8d1840d2a0…

MALICIOUS

PDF

48.5 KB Created: 2020-08-28 13:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99230955e422e59d89a24b2554ef8439 SHA-1: e5385297b6162daf6fdf777420961338ff1b9658 SHA-256: fa351c8d1840d2a0b4f7c46e1ac5f3c24bf32dd116e1e3cc34044f0cc1cf8a21
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 external resources. One critical heuristic indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=yamaha+rx+v385+review', suggesting an attempt to direct users to malicious sites. The document body, though heavily obfuscated, contains this URL and other PDF links, reinforcing the attack pattern of a link farm designed to lead users to potentially harmful content.

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=yamaha+rx+v385+review In PDF document text
    • http://najepak.cainedelup.com/uploads/1/3/1/3/131380213/5a5bca.pdfIn PDF document text
    • http://mexonoxi.tripwithchris.com/uploads/1/3/0/7/130738936/5820455.pdfIn PDF document text
    • http://pibalet.newglasgowmassage.ca/uploads/1/3/1/4/131408738/wefefunugivad.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/1/0433/3161/6923/files/beginner_acting_resume_template_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/learning_disabilities_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/pujuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7084/7131/files/smokker_til_brnemalerier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/71827191210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/79679743420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7974/6207/files/xawadigexiwigodejopewizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/37370926368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/66069617850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7711/5544/files/centos_6._10_iso_32_bit.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 1

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_off00007ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE1 5380 bytes
SHA-256: 0f7e5696f425fd07b12e8a0b41a40f9f73409b2af0c3b40737b13aa01f660fcb
font_01_sfnt_off0000911f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x911F 10684 bytes
SHA-256: a73c5b548c5113b3c76949e75c627506bd4665006ac78997ee0b0ab98768477b

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