Malicious PDF — malware analysis report

Static analysis result for SHA-256 c293cdbe7efef839…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 01:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f987b541066a5606b818358a7f647046 SHA-1: 9d9b0287f576efe0b022479018c6e37d72e1bbf9 SHA-256: c293cdbe7efef8396e4a0f1b8e67ff5ac2fb0a3ce79fd064bc2c3c0d20d8783d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and a keyword suggestive of a lure. The primary attack pattern involves directing the user to malicious infrastructure via these links.

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=msp+hack+no+human+verification
    • https://cdn.shopify.com/s/files/1/0431/5555/4470/files/halloween_word_search_hard.pdf
    • https://cdn.shopify.com/s/files/1/0461/2148/4452/files/14967591654.pdf
    • https://cdn.shopify.com/s/files/1/0440/8259/3957/files/algorithm_design_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/the_hateful_eight_movie_moviescounter.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/steel_shed_plans.pdf
    • https://cdn.shopify.com/s/files/1/0429/2434/3462/files/c_reverse_string.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/liftmaster_893max_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/39844036537.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1799/files/jawefafukemapal.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/64708771872.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/26802385826.pdf
    • https://static.usrfiles.com/ugd/b8c837_db717865b5ba41c1bcb094b2cef30467.pdf
    • https://static.usrfiles.com/ugd/f103bb_528aaf35b49249bc8edc0b5b066fc94e.pdf
    • https://static.usrfiles.com/ugd/b8c837_548c94c05dee4178b9bbfeab9398e19c.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_66d79cf5566b4618b8ec4e283d15a528.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_b597a99dd8c24e79adbac0bdcb266463.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_off0000676a.bin
302e306594f85de65a9f2bac0dc3623eb8f2a3739bad8e156208d23a2c415750
pdf-font-stream PDF embedded font (sfnt) at offset 0x676A 5352 bytes
font_01_sfnt_off0000797e.bin
a2362fa26a9c192f1f5f764a9555e19176117767b074b2e4c6c004c437f96fd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x797E 10796 bytes