Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b57b35e318da9e…

MALICIOUS

PDF

57.7 KB Created: 2020-08-19 03:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ecfb6236ccb44e74bfd2401642fef397 SHA-1: 13065a8e8ff793e1d2adf2bbafad3e7553caca66 SHA-256: 13b57b35e318da9ebc6a63dd73c5e23a5944d82f7802cb1a4223d4f76ab0305b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a primary link redirecting through 'ttraff.cc', a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Sql payloads cheat sheet' and the malicious URL, suggesting a phishing lure. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links points to a link farm or SEO abuse for 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.cc/pify?keyword=sql+payloads+cheat+sheet In PDF document text
    • http://jakumixux.azcarpetinstall.com/uploads/1/3/1/3/131383544/putejemovebil_kesof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/2407573969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1632/1184/files/76426100154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/arihant_integral_calculus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0173/0456/files/93904612566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/87517741582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/fopavalegatamebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/65512057431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/abstract_reasoning_test_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/alter_ego_french_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/fudofetotujukevovozoku.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FF 5028 bytes
SHA-256: 1816f7281b4232797de8e79802fad06dc3df776136c011e67cd8ff3e6f3a37e4
font_01_sfnt_off00009526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9526 17760 bytes
SHA-256: b085f3281e1c8c9cec4248f68f763d84ff9f03880e4cdf238641d2ec5e601701
font_02_sfnt_off0000cc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC59 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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