Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec9d37406117902…

MALICIOUS

PDF

41.7 KB Created: 2020-09-06 00:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cb7b58d0ffa5ec61fa485b34de9615f SHA-1: 2804b1598c54ae27f8cf91f4721099a25b514026 SHA-256: 4ec9d37406117902b78b207a20b1a67f7f0c6fb19010016967597e76f4ab74a1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains text related to 'caller location app android free' and the malicious URL itself, suggesting a social engineering lure. The PDF also contains a large number of embedded links, many pointing to shopify.com domains, which is characteristic of SEO link farms used to disguise malicious activity. The primary malicious IOC is the redirector URL.

Heuristics 3

  • 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.
  • 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.me/pify?keyword=caller+location+app+android+free
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/air_mass_how_are_they_formed.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/78132555228.pdf
    • https://cdn.shopify.com/s/files/1/0429/7503/5541/files/dobexuve.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/3555539575.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/britannia_deck_plans_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/b_v_raman.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/kalnirnay_hindu_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/4511/0438/files/alter_ego_3_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4955/7917/files/30963638111.pdf
    • https://cdn.shopify.com/s/files/1/0432/5811/8312/files/66051584821.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/xawizonuxibizusuratem.pdf
    • https://static.usrfiles.com/ugd/b4609a_2200abd8aa1d45c789c499aa18e01a0e.pdf
    • https://static.usrfiles.com/ugd/d5d855_752a06ed6eb546529a63dc729cbe571b.pdf
    • https://static.usrfiles.com/ugd/dad7b5_7fcec03879c84996b993c1a5709cf6cd.pdf
    • https://static.usrfiles.com/ugd/1decf9_7bc5f29088184c41af5d21fdd28454e6.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_off00006762.bin
955daf0ba41cb6f1fc30ba2aa5c6c8ff2a3e7f4c4f8131788619a925faa27cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6762 4876 bytes
font_01_sfnt_off00007809.bin
75b643375b1fc4db6e60c3099e56c95f4c3e65f76d2a35df1e813ae28f6dac91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7809 10012 bytes

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