Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eca06ea53dea2cd…

MALICIOUS

PDF

44.4 KB Created: 2020-08-17 16:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61e9e712bf02005cfd1b69cfd9d38a7a SHA-1: 7f8343ed84702383e4d1fbf2413cdf71aa9ddb5c SHA-256: 5eca06ea53dea2cd6acda6b6a131b28f15857ed25654b91697ccaf24e1f2e63b
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also listed as an embedded URL. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to a Shopify domain. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, likely to lure users to malicious sites.

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.ru/pify?keyword=angular+form+input+textarea
    • http://files.mt-bethel-umc.org/uploads/1/3/1/3/131398204/9298395.pdf
    • http://files.mcrudin.com/uploads/1/3/1/4/131483955/xolevunixeka_silofelebir_sapugebeg_gepapozogigo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/tafegujofafukera.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/samsung_side_by_side_refrigerator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8077/files/sight_word_activities_kindergarten_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/gucci_mane_songs_list.pdf
    • https://cdn.shopify.com/s/files/1/0448/1361/5264/files/newton_motor_ability_test.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2069/files/rokapomubevepuwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/91872400791.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/80434912138.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/22918680273.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/combiner_deux_en_un.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5549/files/jomepusetagasujovakitipij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057d2.bin
4bf64587b6e2b7c0d09fef3dab5cedabdd8fb7cb98b0f01888741c10d1a191d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D2 4980 bytes
font_01_sfnt_off000068b2.bin
88685c8edd2664ff08e1c333b50baab41b765a7caa3c4ab150abafb7160fe461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B2 14696 bytes
font_02_sfnt_off000096ca.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96CA 4324 bytes

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