Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a41f4d10533b63…

MALICIOUS

PDF

36.2 KB Created: 2020-08-02 03:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bb1604348ed6dbc692c940dd9b78af3 SHA-1: 539c6342cd86a09a4d33ea77e8a875aea15f7940 SHA-256: e9a41f4d10533b636112a88e2d9e57164fb6e80fa766b87944036d54674328d5
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'Garrett tpe331 maintenance manual' and includes the malicious URL, suggesting a lure to trick users into clicking the link. 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.com/pify?keyword=garrett+tpe331+maintenance+manual
    • http://files.carlfismer.com/uploads/1/3/2/3/132302716/sulawopawopavokiv.pdf
    • http://files.autodogfeeders.com/uploads/1/3/1/4/131438459/felimiv_jesomib_rininag_gugeputo.pdf
    • http://files.sensegym.com/uploads/1/3/2/7/132740185/wuzixuwubusi.pdf
    • http://files.hg-entertainment.com/uploads/1/3/1/3/131380337/a8d40.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/fafuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/ninil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/putasanebipalozuka.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/36085973383.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/22517889825.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/90483191501.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/sas_70_reports.pdf
    • https://cdn.shopify.com/s/files/1/0430/9522/8565/files/40214283785.pdf
    • https://cdn.shopify.com/s/files/1/0437/7880/1822/files/73603287402.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/dekidijemuropigelamekanu.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_off000045fb.bin
385148863b437684fd896aa60a603ee6a47689a177a83ed4b9b4b177583ab163
pdf-font-stream PDF embedded font (sfnt) at offset 0x45FB 4920 bytes
font_01_sfnt_off000056a3.bin
0b99a0fe1c203871b0e2374944fbdd3ef504927e9183584dde813ce4736869cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x56A3 9148 bytes
font_02_sfnt_off000075bf.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x75BF 4324 bytes