Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1353242814ec917…

MALICIOUS

PDF

36.5 KB Created: 2020-08-31 07:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d55310dca113881241fdda0ce6c2a035 SHA-1: 733b63773f7de620e495194f7f1a74a196796586 SHA-256: d1353242814ec917b6ade0c3cf930f28149936e322c8ae1fcdd8a9bfda16eb79
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous Shopify links, while mostly benign, could be an attempt to blend in or host secondary payloads.

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/wix?keyword=sujet+e2+bac+pro+eleec
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/lipefodute.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/guwiwelolelaxajoxube.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/the_fairy-_tale_detectives.pdf
    • https://cdn.shopify.com/s/files/1/0428/2220/5607/files/ben_10_cartoon_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/mavowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopesutokuvikoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/6581/9814/files/giraparaxawukokup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6453/2900/files/17487789361.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/bhojpuri_movie_video_gaan.pdf
    • https://cdn.shopify.com/s/files/1/0444/1541/8534/files/26489362674.pdf
    • https://cdn.shopify.com/s/files/1/0432/9642/4096/files/47717935580.pdf
    • https://cdn.shopify.com/s/files/1/0438/0337/7824/files/21352078319.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/3._045_0._35.pdf
    • https://static.usrfiles.com/ugd/b8c837_fba881b756674e429f852991f1cceaf2.pdf
    • https://static.usrfiles.com/ugd/837d34_1c79912cd78f45be9989f948fdfb6058.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_off00005105.bin
5bd931c8bf90e297b1ebb060220863f00c456468d88b2ebbaea787e6fdc39646
pdf-font-stream PDF embedded font (sfnt) at offset 0x5105 5200 bytes
font_01_sfnt_off000062c0.bin
693c8b5e3c2771c4ae20bcedaee70c8462f380fdebb49f0a3c5a653b86c532ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 10552 bytes