Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64338d605245864…

MALICIOUS

PDF

36.6 KB Created: 2020-08-25 03:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6b8e3599a10ea68108ea9919a5ec4be SHA-1: b8534370795b26139e87f9a8a3193063412b6ce7 SHA-256: a64338d605245864f21f2d089175ed225cc3a6e046e5307574d95afc0f86dc88
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though partially corrupted, contains the same topic as the malicious URL, suggesting a lure. No scripts were extracted from this sample.

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=casey%2527+s+breakfast+pizza+nutrition+information
    • http://files.drawingthelinewithlove.com/uploads/1/3/0/7/130775528/9909490.pdf
    • https://cdn.shopify.com/s/files/1/0431/8619/2546/files/6th_grade_author_s_purpose_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/pobopejexefokumifevali.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/99755301520.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/wuxaliraj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0294/5959/files/wefifagugub.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/9831835096.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/16136617166.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/wozonosuwasuluvix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/aiag_fmea_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5424/files/autocad_2016_crack_free_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0431/2947/1130/files/sakojagiwedapadotekefub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1589/files/complete_bodybuilding_exercises_with_color_photos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/sexinuxedozijubajad.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_off00005259.bin
b141efef2d301e1e96362e407c2647f2723ded0229f5e715954bbd1b26962f88
pdf-font-stream PDF embedded font (sfnt) at offset 0x5259 5312 bytes
font_01_sfnt_off00006467.bin
a225db7f6f84682355f2d27a518229ff119920eb867ab1b53779a2ba760e30f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6467 9636 bytes