Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18e49916889f0a8…

MALICIOUS

PDF

40.7 KB Created: 2020-08-29 18:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf1ab8fbb1db0e59a314de52d4cd1c7c SHA-1: cf0a39687d80a8f95b637aa68af6543b59f0a25c SHA-256: f18e49916889f0a88ffb635eccec6353f062b4fad1d7dfbc46334bfef897b44d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc' with a query parameter suggesting a download lure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL, which likely leads to further malicious 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.cc/wix?keyword=download+iqiyi+videos
    • https://cdn.shopify.com/s/files/1/0437/7814/6462/files/41104304016.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/blue_bird_naruto_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3954/5761/files/penawuferopovigajivagew.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/fifidovepamugivazanigaris.pdf
    • https://cdn.shopify.com/s/files/1/0433/2974/9145/files/zetebadijugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/lobaguputevonagibolebejat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/53480724945.pdf
    • https://static.usrfiles.com/ugd/b8c837_e140007085bc436899dd611ba47cae93.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa498cbccd3f411cb42edd933d93e5fa.pdf
    • https://static.usrfiles.com/ugd/e4a001_aebfc9cbbd1940539afe006308657d4f.pdf
    • https://cdn.shopify.com/s/files/1/0431/5886/4028/files/biblia_catolica_completa_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/fujoganixuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/73759336198.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_off000062ee.bin
2a7ca40dd9cde3c4b251687e206d9f6678dab30c9c8804014449fbaa7c2a5708
pdf-font-stream PDF embedded font (sfnt) at offset 0x62EE 5104 bytes
font_01_sfnt_off00007479.bin
313f21a6087781f0bd7aabde1e2bf77fdbf28a022ffd26facddb39c704e37b58
pdf-font-stream PDF embedded font (sfnt) at offset 0x7479 9948 bytes