Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f070b8f8610eb4…

MALICIOUS

PDF

45.0 KB Created: 2020-07-30 16:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bcd49997d9f546d5613e9192666010b1 SHA-1: d9aa639f72e2f666dd54be29ea708f52d60318ea SHA-256: f1f070b8f8610eb42b758ca83a5d852b8f1d64b87cf69b86353704ee9af3d829
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be related to a 'ms word to pdf converter', a common lure. The ML classifier also flagged this PDF with high confidence. The primary attack vector involves redirecting the user to malicious infrastructure via embedded 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.cc/pify?keyword=ms+word+to+pdf+converter+offline+software In PDF document text
    • http://files.tacomateasandherbs.com/uploads/1/3/0/8/130814516/nasoganinuxamun_dawaboloda.pdfIn PDF document text
    • http://files.trampleals.org/uploads/1/3/1/3/131398360/puwewuge.pdfIn PDF document text
    • http://files.frankklohr.com/uploads/1/3/1/4/131437119/8938845.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/1/0428/2250/0518/files/fewidubitafikodokun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/gisuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/9241730517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/zevosisazuronusesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/58123238783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6350/8121/files/64199698894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/90905810993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/78216455809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0833/4751/files/15799340505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/99606986674.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_off00007334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7334 5096 bytes
SHA-256: c36954728868f3f1197db6bf0c68779c06fad0123d423f3867d8c2a2208c6a8f
font_01_sfnt_off000084b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B4 10000 bytes
SHA-256: c2921027e076b377281bd8e0cfef1fce0611d6ace23d22e05cbc3a7114669fce

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