Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1e8fce1b5115b0…

MALICIOUS

PDF

36.6 KB Created: 2020-08-01 23:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9785e7dbaaba2aca45f1db5d664785e SHA-1: 19cbf10359adfec8bc478ca6764b3da857d9b21e SHA-256: 5c1e8fce1b5115b050a8cb3eed5cde5f5a8902ce01129263eb04e59e412de86f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.com/pify?keyword=theory+of+interest+kellison+pdf. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites.

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=theory+of+interest+kellison+pdf
    • http://files.meverettart.com/uploads/1/3/1/4/131453897/b5d73ee3fd.pdf
    • http://files.delavalredstandardpoodles.net/uploads/1/3/0/7/130776406/98278dcd03bf.pdf
    • http://files.yetiwaterpolo.com/uploads/1/3/0/8/130874265/8167972.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9409/8598/files/89101577774.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1042/files/ruxajagejudajizopojilepem.pdf
    • https://cdn.shopify.com/s/files/1/0428/1185/0918/files/11605158332.pdf
    • https://cdn.shopify.com/s/files/1/0438/0409/8722/files/68581434929.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/gadovirodipudujevipur.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/70906853155.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/6277553108.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/86447996603.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/talalomorixugonedonoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007074416.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jazaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/zajofuzejovovidopuritolas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004599.bin
18ba82e8e82f97a6c897e998aaafd67d7acb16fd3cbb8f85499616f765951058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4599 4820 bytes
font_01_sfnt_off000055f7.bin
ce8a1ded7e23729d366c3a8b7eddfb176d02480490c0d2a7ee044a2666045d35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55F7 9876 bytes
font_02_sfnt_off000077b8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B8 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.