Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c92212636492d89…

MALICIOUS

PDF

49.4 KB Created: 2020-08-19 06:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b7aadbe07a7a6530e6682739ace2279 SHA-1: d6186e0a6d4bb147703b5b3334e8c48c3a943f3d SHA-256: 4c92212636492d89c6fb8a41bd01490b74b87a5b11aad996aa4a525db5eab776
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=pollination+in+plants+video, which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended lure. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=pollination+in+plants+video
    • http://files.arlingtonmsband.com/uploads/1/3/1/6/131606087/ddee7.pdf
    • http://joxazef.brentwoodpetresort.net/uploads/1/3/1/4/131454269/277499.pdf
    • http://dofisavo.miaheintzelman.com/uploads/1/3/0/8/130873851/3f2c2d3d96c.pdf
    • http://files.bobcoxphotography.com/uploads/1/3/1/4/131453733/7307309.pdf
    • https://cdn.shopify.com/s/files/1/0431/6699/0498/files/43283086712.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0789/files/lisiboxutu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2062/9654/files/antidiabetic_activity.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/83171973583.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/bawanirilaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/mud_logging_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/lowevatovidegusenazetane.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3073/files/vutomozuwelalinese.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/thin_air_amelie_sheet_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076e2.bin
43b7c2873f757ca8ee2866ac97223bf2d50dee85ea26b1b5868d6f8c3a5e143e
pdf-font-stream PDF embedded font (sfnt) at offset 0x76E2 4708 bytes
font_01_sfnt_off000086e6.bin
8a6e29d7b431a8824af39064a59dd56e913dc736b9a2cf2ad3c64b4ac020016a
pdf-font-stream PDF embedded font (sfnt) at offset 0x86E6 10352 bytes
font_02_sfnt_off0000aa45.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA45 4324 bytes