Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67a7f1ee3a2a413…

MALICIOUS

PDF

35.2 KB Created: 2020-08-19 00:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24015726d5d59964d5f22c12e941b95f SHA-1: 7eb83896ccb6750293d3b3480fb8864c5a8af641 SHA-256: b67a7f1ee3a2a4136d54b0798c235c6cd1a6a865b09d58bceec7f99d06e0ce1b
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=reporte+indigo+telefono', suggesting a lure related to a phone report. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, as indicated by the PDF_SEO_LINK_FARM heuristic. 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.com/pify?keyword=reporte+indigo+telefono
    • http://files.thepathclearer.com.au/uploads/1/3/0/7/130739258/levepidifegar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7208/5406/files/73029091502.pdf
    • https://cdn.shopify.com/s/files/1/0447/0787/2921/files/fetch_catch_error.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/80478677024.pdf
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/82553076101.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/86327852945.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/17717319142.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/98461513369.pdf
    • https://cdn.shopify.com/s/files/1/0434/5007/3240/files/biochemistry_objective_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/60678909469.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/hearthstone_arena_class_tier_list.pdf
    • https://cdn.shopify.com/s/files/1/0439/4765/5323/files/dapebetisulelov.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/btec_level_3_national_business_book_1.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_off00004278.bin
131954ea602bff40fcc09985dd535ea911203cd04f6c871bd955a80228d782b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x4278 4616 bytes
font_01_sfnt_off0000523c.bin
2e98d854507f7a9c671c61e473ec750784c130420a95db1604652216a0ab44da
pdf-font-stream PDF embedded font (sfnt) at offset 0x523C 9292 bytes
font_02_sfnt_off00007200.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 4324 bytes