Malicious PDF — malware analysis report

Static analysis result for SHA-256 e405cba7f13c7a9e…

MALICIOUS

PDF

53.0 KB Created: 2020-07-31 14:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 265f6ae59484b9e89a1f8990b44916ad SHA-1: 4004e5228df28d77fdf65d6210be62a497ef5428 SHA-256: e405cba7f13c7a9e2259caf76f9c00d0fdbd47e2809162e8dd74efcd046967fe
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'audio amp circuits'. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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.com/pify?keyword=audio+amp+circuits+pdf In PDF document text
    • http://files.tbenthusiast.shop/uploads/1/3/1/3/131383998/tomatasuje.pdfIn PDF document text
    • http://files.spcervantes.com/uploads/1/3/1/3/131380728/258799.pdfIn PDF document text
    • http://files.heartlightcharlotte.org/uploads/1/3/0/7/130775380/diwurasokivasulupif.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/1/0437/0143/6566/files/fidij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/69411369037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1491/3191/files/konasabegijebolevadope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/panem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/86733664432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6870/0310/files/gepuvumopimobutap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/lukavumajefakarokuvagepir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7022/5574/files/bebibotuperazasaromik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/40736026525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/kurupegij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/zokerixirupojomuvam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/fusezalajavixof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/3103984016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87743453122.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 5

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_off000091f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F1 4916 bytes
SHA-256: 644f3a52a7355aa5f3b36f5a954b928c90f3f9e8850235678aa65a1939db9f73
font_01_sfnt_off0000a2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A5 10640 bytes
SHA-256: 269787aa870f03984dcb1060681efbf505df2e41b882e02c2009ae1356736cac

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