Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea2650759f78172…

MALICIOUS

PDF

37.2 KB Created: 2020-08-05 02:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b0839ead15ba4c177ad2f89857fd011 SHA-1: f6e82fdb889c1cf6192b0b04777666f3219d8caf SHA-256: bea2650759f7817280f992be6c313d14f705384d35fe076c463f5dcc6307929b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are SEO-optimized PDF files hosted on Shopify. One of the primary links, https://ttraff.ru/wb?keyword=kitchenaid%20slide%20in%20electric%20range%20user%20manual, is identified as a malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated.

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/wb?keyword=kitchenaid%20slide%20in%20electric%20range%20user%20manual
    • http://files.classiccitychef.com/uploads/1/3/0/8/130874192/vadib.pdf
    • http://files.gwentogo.com/uploads/1/3/1/3/131381640/wenupuvo.pdf
    • http://lutonixuw.lifessweetinc.com/uploads/1/3/0/7/130776046/7c49accf5183928.pdf
    • http://files.toymigos.com/uploads/1/3/1/8/131856381/61b8c1a.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/5428490166.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/jezugogefegonama.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/xazapowawuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/present_perfect_simple_already_yet_just_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/38223945855.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/89752721400.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/berserk_manga_mega.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3363/files/biogenic_elements.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4571/files/58993825559.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/34921845483.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/best_python_tutorial_for_beginners.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005117.bin
75ab6a2e36b56ae312111acc262e07584ff0606841bb2bf249db6391475c8341
pdf-font-stream PDF embedded font (sfnt) at offset 0x5117 5320 bytes
font_01_sfnt_off0000630c.bin
3a80bdff381d1534487be63f8d8454a937f8cd46e0d61920a48ef9958c6df88b
pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 10348 bytes