Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32e5139379933b9…

MALICIOUS

PDF

98.9 KB Created: 2020-09-05 07:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a4dd69789289e16a9fa63ac85933c2c SHA-1: eebd1f3c50bb742790272be1b9a12161e1231513 SHA-256: d32e5139379933b9858e184641a420cee0c40a4c9714726aae3c5464b93257a0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it features a mass external PDF link farm, with the first URL being a Shopify link. The document body, though heavily obfuscated, contains the same malicious URL. This indicates a likely phishing or malware distribution attempt using a lure related to 'artificer battlesmith guide'.

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/wix?keyword=artificer+battlesmith+guide
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/quizlet_premium_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0439/1033/2571/files/fybsc_biotechnology_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6378/files/wii_u_usb_helper_title_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/waxekisexerilepe.pdf
    • https://cdn.shopify.com/s/files/1/0459/9663/8375/files/guided_imagery_for_stress_relief.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1097/files/12689351840.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_07a351fa7f2e4864b36b0297acb629b2.pdf
    • https://static.usrfiles.com/ugd/11f207_f8c1d0e9809748b5994c50267bf020e0.pdf
    • https://static.usrfiles.com/ugd/a8c229_61db5814aa4e46a0970c73be5e28854e.pdf
    • https://static.usrfiles.com/ugd/694d5d_e2a405745f4e4ac8b63ad88887bdc166.pdf
    • https://static.usrfiles.com/ugd/3402b1_8b048dada62c410397ab7712b8292c01.pdf
    • https://static.usrfiles.com/ugd/83e584_469f1828bfdb4ed6834091c84f4e2ec5.pdf
    • https://static.usrfiles.com/ugd/ca32a8_139557605aaa4a94b7752ae145305b15.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_off00013aa8.bin
c715ac736cf62448932e5cf09758e75ad309af3fb9a03140adae3688b8db83ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA8 5232 bytes
font_01_sfnt_off00014c6a.bin
c0f3a0c77c5b1edf55e593d677f7287db339ad3358c85a0a8b6850d08fbf6729
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C6A 10588 bytes
font_02_sfnt_off0001704c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x1704C 4324 bytes