Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b12c9ebd6209fc…

MALICIOUS

PDF

45.3 KB Created: 2020-08-18 21:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e549c9f3b6c2fb92ae4c122ad16f38 SHA-1: 7f3c95955ba9ab2ddd84d6ed435bb1077bba42bf SHA-256: e9b12c9ebd6209fcf0e72fec66e9a76ae3a883e94ff7adc624f25f6ab8f24904
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document body, though corrupted, contains the text 'Abrir formato cdr en mac', suggesting a lure to open a file. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content.

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=abrir+formato+cdr+en+mac
    • http://gurisepi.informedoiler.com/uploads/1/3/1/3/131379552/tujivazilitotu_vituka_kuwijebuli_ninojapipaveg.pdf
    • http://xelom.wildedgeinc.com/uploads/1/3/1/3/131381882/sulaxena.pdf
    • http://logobu.aulayaiqsimarugut.com/uploads/1/3/1/3/131384635/ce0c45b52d8.pdf
    • http://files.marissabadgley.com/uploads/1/3/1/4/131437724/rinaxonujetuwaviso.pdf
    • http://files.lionsmarkcontracting.com/uploads/1/3/2/6/132681728/lazotomo_sijosi_fatupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/47473097651.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/40164663631.pdf
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/abcam_western_blot_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/75573383629.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/xojewanap.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/google_sheets_count_if_substring.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/24534600593.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/lujinozuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/58349359948.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/ch_runners_yammering.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/33372493778.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/fuvosubemuz.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_off00006ea5.bin
177afb6a8355cea713bb46d6faf7b3338f8fd131bafad75cb52890b73b65080d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA5 5084 bytes
font_01_sfnt_off00007fcd.bin
93cfeeac6690d6e6277a90ecc97c6bfe0588f6da4e260b76e425269e5e49a65d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCD 12008 bytes

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