Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0312fd43d3172da…

MALICIOUS

PDF

42.5 KB Created: 2020-08-04 17:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3da6ef1113ef64ad6c4cf77bd12567ff SHA-1: 7695f6649ed57a74283999e1986800b7df3c960e SHA-256: a0312fd43d3172da3e400e8aeed171327629260294b2b5bd2f2a7bf54d5dda44
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One of these links, 'https://ttraff.ru/pify?keyword=enlaces+intramoleculares+e+intermoleculares+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to PDF documents, likely intended to trick users into clicking the malicious links.

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/pify?keyword=enlaces+intramoleculares+e+intermoleculares+pdf In PDF document text
    • http://files.sugarcoatedkiss.com/uploads/1/3/0/7/130739450/0adba.pdfIn PDF document text
    • http://files.whaleswim-tonga.com/uploads/1/3/1/6/131607810/f078a366.pdfIn PDF document text
    • http://files.gobeadz.com/uploads/1/3/1/3/131383651/polakaxizan.pdfIn PDF document text
    • http://mubiso.thoughtjotsbrand.com/uploads/1/3/0/8/130874422/vudoxazawuze-sejeximovekoti-foduwuk.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/1/0437/3420/4568/files/kobanokagimuzajawojow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/25171231593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6104/9494/files/25879653946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sedafasejizal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/vudosakedixotabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/segugipabivuriwekajivun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/70055136353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8120/3873/files/13663036240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/xizajimurusiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3708/8154/files/damanuwada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/vekulizimegi.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 4

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_off00006969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6969 5256 bytes
SHA-256: 4544e58ee70e54310bc188c9b3a27fc33609cb7f7bcb8196dfa908c099476e4d
font_01_sfnt_off00007b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B35 9872 bytes
SHA-256: 3a2f565c8d1c403a3ad5c74499c2836e909f344f6b576cc5cd90633e5abf96cf

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