Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6a09ecb9b130e7…

MALICIOUS

PDF

46.7 KB Created: 2020-09-03 09:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15381abddccd63ca0c864c6015571b74 SHA-1: 501abcf3ac3e4448ba888c2946591752b3029bb4 SHA-256: 9d6a09ecb9b130e7459265db8a00b71b375aa0c972be6e344bc7b1bb64f6e7d3
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, specifically pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=bible+gateway+app+android
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/kezuvibewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2548/1379/files/digital_beamforming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0464/1069/4824/files/jokeba.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/59671568262.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/case_study_format_for_mba.pdf
    • https://static.usrfiles.com/ugd/2ac701_bd06b4afb5954e848462126f20c80133.pdf
    • https://static.usrfiles.com/ugd/353d00_e956af2a72614f3cab2e9c4c7ac1618d.pdf
    • https://static.usrfiles.com/ugd/96768c_a89585e05e264ab49f4cb40e1b58b4e9.pdf
    • https://static.usrfiles.com/ugd/4b874d_9db06ca6053f43d29d87e6f219651596.pdf
    • https://static.usrfiles.com/ugd/9374a7_ba911497c3414480a6a2d358f983759c.pdf
    • https://cdn.shopify.com/s/files/1/0434/9617/7816/files/sounds_of_animals_worksheets_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/stash_create_pull_request_command_line.pdf
    • https://static.usrfiles.com/ugd/824332_d65627c6f2e94eceba7542abcc099f75.pdf
    • https://static.usrfiles.com/ugd/8cbfce_79ddf163496a426b8497969d7a65c0d1.pdf
    • https://static.usrfiles.com/ugd/1d64af_378d4dd7a776454092afc24740959e74.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb4.bin
10803d33f7303f92d485f031b946659ac4bbf564c4d1a8cdb1b080d8af9ba231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB4 5120 bytes
font_01_sfnt_off00007d2f.bin
f07b3122f3987f933972558f77f1109d616dc9c6e088db0820494e848f6817ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2F 10120 bytes
font_02_sfnt_off00009fd4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD4 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.