Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28cf868b35233fc…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 10:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b917fce5f72c5a5f4aa56cce7bf5e220 SHA-1: 298b6c4027bf3f84da1dbcbb9b852e9b51240448 SHA-256: a28cf868b35233fc96bc5f32f81cea51c4faff7f03c0df1bb459fd2037e03ed2
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains the URL that triggers the malicious redirector. This suggests the document is designed to lead users to malicious content via a link farm. No scripts were extracted from this sample.

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=autofecundacion+en+plantas+pdf In PDF document text
    • http://files.shellystill.co.uk/uploads/1/3/1/8/131856306/petuwusenalogi.pdfIn PDF document text
    • http://files.shadylanefarm.store/uploads/1/3/1/4/131437953/materef-raxawubilosabik.pdfIn PDF document text
    • http://bonagoto.delhipsunderrajan.com/uploads/1/3/1/8/131871871/f3001cbbfc9ecba.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/1/0428/9229/6359/files/kimemofosok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8323/3448/files/10113595062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/57990975755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/60125063833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/wunelidosimupanol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/vice_city_cheats_psp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/tanuxotiposisisegoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/voveguweganoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/46385503786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/18076345661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3315/0118/files/55337570614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4385/files/23972439084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/maredofoxogafufoze.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 7

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_off00006f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2B 5040 bytes
SHA-256: a9dc2ace1717d7d95c809dcb468a6c89a96169400949ef9dece3d1c7a8d9e838
font_01_sfnt_off0000806b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806B 11196 bytes
SHA-256: 7edf974e51418c8ce06fe6faa40abe86bbc791384c67196ddc4d49c843bd5a7b

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