Malicious PDF — malware analysis report

Static analysis result for SHA-256 981429b830af908c…

MALICIOUS

PDF

47.3 KB Created: 2020-08-31 17:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbd9b156d711747e77a876f560d6a405 SHA-1: 5534477a44bb5815cf3b30bf7b76a33664d26a78 SHA-256: 981429b830af908c61771bae3e157898dcbd96be52e548823e8a9a072f41f85d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/wix?keyword=teks+barzanji+pdf'. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links within the document.

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/wix?keyword=teks+barzanji+pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6295/files/32353984549.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/building_construction_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/afterlife_with_archie_read_comics_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/52583609445.pdf
    • https://static.usrfiles.com/ugd/bf650e_6941c63d452a4baf948ed9c9909c4bd6.pdf
    • https://static.usrfiles.com/ugd/d90490_9634bb884dd2472fbce362711de338e1.pdf
    • https://static.usrfiles.com/ugd/80c1db_ae4322eb136448c49ce333fdd46438f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d400996ab0e4c05ba85024b67e10cf8.pdf
    • https://static.usrfiles.com/ugd/b8c837_57f863d9bab34c468be7b9f1bb901095.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6807/files/6406375373.pdf
    • https://cdn.shopify.com/s/files/1/0438/8320/0680/files/trusting_god_in_hard_times.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_off00007c05.bin
9a2a6351c949d05fc4b5db3a5b3c932c387f651d46160fdf6a32c31fdb700847
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C05 5284 bytes
font_01_sfnt_off00008e14.bin
eee88c24157361744de18d19fc0db6b1fcb0a3b87825c8eb2c5e2dd537a90901
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E14 10104 bytes