Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f26081ccc71441a…

MALICIOUS

PDF

34.0 KB Created: 2020-07-29 13:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a72bdf5d865225600df5b453af2932bb SHA-1: 53a14a589b4348a05fb28b89c690da44a46bd436 SHA-256: 5f26081ccc71441ac37844b8bdf622511e20afe2705f4d733559c33765c5cb93
174 Risk Score

Malware Insights

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

This PDF document is identified as malicious due to its structure, which resembles a screenshot lure designed to trick users into clicking a link. The embedded link `https://ttraff.com/wb?keyword=invt%20chf%20100%20a%20manual` is flagged as a malicious redirector. Additionally, the document contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the overall pattern indicates a phishing or malware distribution attempt.

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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 34 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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/wb?keyword=invt%20chf%20100%20a%20manual
    • http://files.aierossmann.com/uploads/1/3/1/8/131856392/xevanokepatolirago.pdf
    • http://files.beautifuleggsbyjane.com/uploads/1/3/2/7/132740997/278479.pdf
    • http://files.broadoakmusic.uk/uploads/1/3/0/7/130775221/9052d67ab0b.pdf
    • http://files.sweetcheeksphotog.com/uploads/1/3/1/6/131606953/9f0f0650ecb67.pdf
    • http://files.nirornir.com/uploads/1/3/1/6/131636984/gezefeju_zepor_wagejadum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/noxegudotizixojuluwate.pdf
    • https://cdn.shopify.com/s/files/1/0433/2827/4587/files/tafelimoniteselup.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/japuliruvuxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/44024857927.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/15980319706.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/78561066106.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lapifobojupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/sajemijezib.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/daxugazolazagodixiwis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/44091306100.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050ee.bin
31297c00901040d09bb6ef84071a49624b5b8bdcfc73482bd622326a4d0403f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50EE 4644 bytes
font_01_sfnt_off0000608b.bin
b2f4b801099766139224a04282dad852685ce16b7a4e9446c86b21e2ad0bbf69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 7904 bytes

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