Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28b1d8d139b8ad5…

MALICIOUS

PDF

47.3 KB Created: 2020-09-13 12:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69f86769bfc940a102d4139fb1166678 SHA-1: 605a75f896e9500552e51217f5d00b6e1684e1fc SHA-256: e28b1d8d139b8ad5a2d9f152296e2056fd6e09637e1b14e8b5571afa14aedfb3
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a service manual, which redirects to a malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to various external resources, many of which are hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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.me/wix?keyword=echo+chainsaw+service+manual In PDF document text
    • http://files.katarplatformu.com/uploads/1/3/1/1/131164252/425d165d803.pdfIn PDF document text
    • http://norododom.rdpresets.com/uploads/1/3/1/4/131407406/xekenod_gasab.pdfIn PDF document text
    • http://files.bayareabluesdance.com/uploads/1/3/1/4/131437474/koxikolepa.pdfIn PDF document text
    • http://files.2dskihorsemanship.com/uploads/1/3/2/7/132741225/siliwapogifor.pdfIn PDF document text
    • http://femiluw.thesparkministries.com/uploads/1/3/0/8/130813765/ab79b14710b82.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/1/0437/5347/2151/files/gasimipofovojuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1596/1762/files/adapter_bluetooth_usb_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/rewibivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4103/8229/files/free_easy_piano_broadway_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0728/5147/files/gym_workout_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/74774851291.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_off00007b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 5148 bytes
SHA-256: 48fc543d192c3e2537167e27357a911b3ab78de247636243d603cdb3948410e4
font_01_sfnt_off00008cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD8 10524 bytes
SHA-256: ae841337e59752021577cd090ebf58751253d883fec2fac93a98594754b9698e

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