Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6318352a48c647…

MALICIOUS

PDF

32.4 KB Created: 2020-08-14 02:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3bb2b59f43d8ccbd3ac594aa86f7886 SHA-1: b82129582fcbca8a7c583804014868360c7ff5b0 SHA-256: 6d6318352a48c6477600064fa91d207d20b2605e10f0eb4acca7294f7713134c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'photoshop templates' and the malicious URL, suggesting a lure. The presence of multiple PDF links, many pointing to benign Shopify URLs, indicates a link farm strategy, likely to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=baby+background+photoshop+templates
    • http://wuzukito.beautifulfeetentertainment.com/uploads/1/3/2/6/132695535/9985784.pdf
    • http://kuzifed.inspirationstudiosgallery.com/uploads/1/3/2/6/132695569/mewibofafeto.pdf
    • http://files.anabellegrigorescu.com/uploads/1/3/1/3/131384636/eb75e43224587.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/slope_stability_solved_problems.pdf
    • https://cdn.shopify.com/s/files/1/0435/9215/5293/files/gudigi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/wanekilipevak.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/pebupuxenenezu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3917/0466/files/58236807639.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/temisokaveve.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/alphabet_letters_images.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/gezesujasibek.pdf
    • https://cdn.shopify.com/s/files/1/0430/6318/1463/files/61578871091.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/data_analysis_and_graphics_using_r.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5197/files/small_scale_livestock_farming.pdf
    • https://cdn.shopify.com/s/files/1/0451/4234/3833/files/guia_lonely_planet_russia.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/kagesifegubugexoluvoba.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_off00004444.bin
30962098db380d603c7bfeab3004ca85b1509a029c9aa3cde73b22b3b3d6129f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4444 5840 bytes
font_01_sfnt_off000057f9.bin
4ffa40fc652ab57bb7974f874cd8d9507d38e615e6052a480ddfbddfdf351994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F9 8400 bytes

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