Malicious PDF — malware analysis report

Static analysis result for SHA-256 18568a86b604781a…

MALICIOUS

PDF

38.2 KB Created: 2020-08-19 00:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9e44ce225d2ca79b3a3b225579bd7ef SHA-1: b3523e1b7b9b3117f7840cba68ade96ec992330a SHA-256: 18568a86b604781abe5e250eaa61407c8ef10faf4a06a4540721bee00975a4fe
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=bhojpuri+video+2018++holi. The document body, though heavily obfuscated, also contains this URL, indicating its likely purpose is to redirect users to malicious content. No scripts were extracted, but the presence of numerous links and the identified malicious redirector strongly suggest a phishing or redirection attack.

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=bhojpuri+video+2018++holi
    • http://files.wvsabc.com/uploads/1/3/1/0/131070165/2183702.pdf
    • http://files.aslightmistakeinthecode.com/uploads/1/3/2/8/132815206/feseba.pdf
    • http://files.somedaynewfoundlands.com/uploads/1/3/1/4/131454549/bememezaxu.pdf
    • http://files.designingthesustainablesite.com/uploads/1/3/1/6/131637658/9936948.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/80980388546.pdf
    • https://cdn.shopify.com/s/files/1/0448/9166/8647/files/bloons_td_battles_6_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/8608/5277/files/strengths_and_weaknesses_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7157/files/bohemian_rhapsody_sheet_music_piano_musescore.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/axis_direct_brokerage.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/angulos_y_rectas_1o_eso.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2480/files/wesopitukigato.pdf
    • https://cdn.shopify.com/s/files/1/0428/1820/7911/files/keboj.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/trigonometry_10th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/49536373961.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.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_off00004bff.bin
9721cfb8dc20c877753c465efaca9ec0c8e60500f922b16725624c4b183da5ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BFF 5060 bytes
font_01_sfnt_off00005d4f.bin
aa84043cd0fca055719a87a29dde5b5b6af2b6041df495124e2e674d6f60ca3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4F 9488 bytes
font_02_sfnt_off00007dbb.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBB 4324 bytes

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