Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac4bf73fc875aca…

MALICIOUS

PDF

37.9 KB Created: 2020-08-16 15:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69b0838789e7c4d72f0e33eb84cee3f8 SHA-1: ccbaadfc5379510a07853b4efd36d921896e1ee4 SHA-256: cac4bf73fc875aca31b2ae4729a3ffcbb4f2d2912e7aac1c0720576ec79ec61f
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=year+end+summary+report'. This URL is presented within the document body as a "year end summary report", indicating a social engineering lure. The file also contains a large number of embedded links, many hosted on Shopify, suggesting a link farm or distribution mechanism. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=year+end+summary+report In PDF document text
    • http://files.lambfarmdesigns.com/uploads/1/3/0/8/130813846/pawevi.pdfIn PDF document text
    • http://soxiv.sylviashanahan1.com/uploads/1/3/1/0/131071041/4654233.pdfIn PDF document text
    • http://dekepekev.kosative.com/uploads/1/3/1/4/131452824/a55b5fc.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/1/0435/4143/0440/files/rexoxadopodizujulub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8959/1461/files/tebamebugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/tawawujugapixomuxusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/delafifesotunegafewofev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/psc_bulletin_december_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/vitakexabududozatudazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/23777191982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/rabivur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7803/1262/files/govejafapavazidebizit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4969/7959/files/beaver_rv_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/estatuto_anticorrupcion_2020.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 3

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_off00005a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A54 5136 bytes
SHA-256: ddc59c226189f8b114a1dd7ccb4239c2eaca9afdd9f0d7b0ad0d023c6a5d6027
font_01_sfnt_off00006bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB8 9232 bytes
SHA-256: 8504c13ac0c2b9ae83673e4e81c03b0093d60012afed8c3ed82b4da37f1871df

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