Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fae646c4ab3b921…

MALICIOUS

PDF

36.9 KB Created: 2020-08-27 19:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb8b9a2ec925a45c75acbe6ce7d10d0e SHA-1: 84892b412e7e5cfbef78ace569747bd15a7b7429 SHA-256: 3fae646c4ab3b921a32702a99b3a5213e561de007736a7d51248f3b6f9170eb6
152 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous PDF files hosted on Shopify, likely for SEO poisoning. The primary malicious indicator is the embedded URL that redirects to 'ttraff.com', a known malicious redirector. This suggests the document's purpose is to lure users to malicious infrastructure under the guise of educational 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.com/pify?keyword=area+and+perimeter+compound+shapes+t
    • http://files.peakhealthcaremaryland.com/uploads/1/3/1/4/131406816/rizapisopasiraluzoga.pdf
    • http://files.dansussman.com/uploads/1/3/2/6/132695455/pekagedozupuzimugi.pdf
    • http://files.ignaciovaldes.net/uploads/1/3/1/4/131407818/figuvozariwadaji.pdf
    • http://files.listerpartyrental.com/uploads/1/3/1/3/131384604/vipagerutalujeg.pdf
    • http://files.randybaskerville.com/uploads/1/3/1/8/131871605/8a2dd051.pdf
    • https://cdn.shopify.com/s/files/1/0457/3167/6326/files/hppsc_answer_key_692.pdf
    • https://cdn.shopify.com/s/files/1/0430/7212/7125/files/96960641559.pdf
    • https://cdn.shopify.com/s/files/1/0440/7066/6390/files/laxiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/2k16_badges_glitch.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/bar_bending_machine_electrical_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4790/files/supulubimaluduwidar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/process_of_performance_appraisal_in_hrm.pdf
    • https://cdn.shopify.com/s/files/1/0434/0449/2957/files/11994161635.pdf
    • https://cdn.shopify.com/s/files/1/0438/7795/7800/files/valexewexodajulabana.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5317/files/fotatajejoniz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/modinivofiwoxavojawoji.pdf
    • https://cdn.shopify.com/s/files/1/0447/7665/2949/files/disney_peter_pan_jr_script.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_off0000540e.bin
1fa86583185e77d449654f4899012a22ae3b8e1155103f15190b95923a06905a
pdf-font-stream PDF embedded font (sfnt) at offset 0x540E 5272 bytes
font_01_sfnt_off000065bd.bin
47ed8bfc68a1512af20327b86c7b44b20f594011447375918158db1549232b87
pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 9712 bytes