Malicious PDF — malware analysis report

Static analysis result for SHA-256 613536397ca10ea3…

MALICIOUS

PDF

39.2 KB Created: 2020-08-20 02:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bbf79279fbe1a1b13e56ae186d54cf4 SHA-1: 7e229adc030686a99c0fbd60bed48f53d4ace3b5 SHA-256: 613536397ca10ea35d45d289c3e1b5f91d83bec94ab28e985c9bd2e073d2ef66
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.ru'. The document body, though partially corrupted, contains text referencing '7408 datasheet pdf', suggesting a lure. The presence of a mass external PDF link farm further indicates a malicious intent to distribute or redirect users to potentially harmful 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=7408+datasheet+pdf
    • http://files.mayaolsonphotography.com/uploads/1/3/1/4/131454034/fofozu.pdf
    • http://sisuxake.hmongumc.org/uploads/1/3/1/4/131437508/1956111.pdf
    • http://files.thatsummer.org/uploads/1/3/0/7/130775565/1109077.pdf
    • http://files.jessicasnyderedits.com/uploads/1/3/1/8/131856039/cee7ef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5030/2616/files/duzaxevanonafupomunez.pdf
    • https://cdn.shopify.com/s/files/1/0430/5960/9753/files/midnight_commander_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0681/files/aladdin_and_his_magic_lamp.pdf
    • https://cdn.shopify.com/s/files/1/0438/0445/9170/files/upsssc_admit_card_2018.pdf
    • https://cdn.shopify.com/s/files/1/0437/7001/9994/files/attention_guitar_fingerstyle.pdf
    • https://cdn.shopify.com/s/files/1/0434/8955/8680/files/69405557940.pdf
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/jeteditarigad.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_off00004b6e.bin
0e98be67eba76635c4b8fe859c6685a7f8be9ebe5c5fe1cf367e745f4f5b5c2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6E 4068 bytes
font_01_sfnt_off000059e6.bin
fe0d066d763bfb9f136a4fc321cad836c38a41fe874e84fb0f399eed2ebc412f
pdf-font-stream PDF embedded font (sfnt) at offset 0x59E6 5408 bytes
font_02_sfnt_off00006c4b.bin
d17e43a9ab0b94ac703ef777c4a17a66ff89507d67278e946758d5e4fe55032d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4B 10184 bytes