Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e2abe399a1bd65…

MALICIOUS

PDF

35.4 KB Created: 2020-08-05 07:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ec55afebe3fcada4e33ca69c19c4dca SHA-1: 9caf58cce9b89a8e909e5a175c7687afebb969f4 SHA-256: 66e2abe399a1bd656b43d3e28b4594b73fbe740f79ee534b951ecc740e47fd1f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including a critical redirector link to 'ttraff.com' disguised as a product manual search result. This suggests a phishing or scam attempt designed to lead users to malicious websites. The ML classifier strongly supports the malicious verdict, and the presence of multiple external links indicates a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/wb?keyword=qualcast%20petrol%20strimmer%20cdb30a%20manual
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdf
    • http://files.thecannabisdoula.org/uploads/1/3/2/7/132740533/1d8031f65e.pdf
    • http://files.hinxworthandedworthvillagehall.org.uk/uploads/1/3/1/4/131406403/pivonove.pdf
    • http://files.orchardviewchoir.com/uploads/1/3/1/6/131637255/fiwujiralagu-vapamazazuwega.pdf
    • http://files.craations.com/uploads/1/3/1/0/131069934/pizafijosuxibiwon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8339/8310/files/23570764028.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/dudefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/orange_county_register_crosswords.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/gorejenomididexukubegogu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9780/7265/files/58119281674.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/2114236815.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/kekitalasa.pdf
    • https://cdn.shopify.com/s/files/1/0448/4169/7441/files/cauchy_sequence.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/anions_and_cations_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedepisolutiri.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c42.bin
c318415c206017c78cd1bd498c558adddff86b891f7e5dcb27bcf54d176d85ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C42 5724 bytes
font_01_sfnt_off00005f92.bin
462374fffa29261c6360949f260c4d6464cc1b055759d820b81166072067a8e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F92 9696 bytes

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