Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a49a935a5760b44…

MALICIOUS

PDF

88.2 KB Created: 2020-08-30 15:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 402b5e74764d8bed133cf8e4a8b3d378 SHA-1: 00425d0c958b9a901d4438ed758de68fa428e037 SHA-256: 8a49a935a5760b4439ca268d2bbb75630f3e61a6474ceba7e1bd39c6c1f90e01
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=distributed+algorithms+nancy+lynch+pdf'. Additionally, another critical heuristic indicates a PDF link farm, with the first URL being 'https://cdn.shopify.com/s/files/1/0436/6378/6137/files/jisogigivi.pdf'. The document body, though heavily obfuscated, contains the malicious redirector URL. This suggests the document's primary purpose is to redirect the user to malicious content, likely for phishing or malware distribution.

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.cc/wix?keyword=distributed+algorithms+nancy+lynch+pdf
    • https://cdn.shopify.com/s/files/1/0436/6378/6137/files/jisogigivi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/boondocks_season_4_episode_9.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/numerical_mathematics_and_computing_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/html_tags_with_examples_and_output.pdf
    • https://cdn.shopify.com/s/files/1/0434/1393/0138/files/71509488927.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/zudawutegazup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/82369750286.pdf
    • https://cdn.shopify.com/s/files/1/0447/7711/1701/files/alter_ego_plus_a2_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0430/7602/6522/files/kimujema.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6578/files/chelsea_vs_newcastle_live_stream.pdf
    • https://cdn.shopify.com/s/files/1/0438/5082/5893/files/bad_blood_remix_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/14389724082.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/anno_2205_orbital_layout.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/vudotaf.pdf
    • https://static.usrfiles.com/ugd/b5472a_fc74dbf6fd31473cb0c488612fc3d111.pdf
    • https://static.usrfiles.com/ugd/7f46b5_32b93572dd7d487cb84958b2ad22abc4.pdf
    • https://static.usrfiles.com/ugd/a4d998_ea96dd837716435e9c7a60701fccfc14.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_off00011cb1.bin
102316df8ee46f16037ac71b6386290f2a0ba6a1161686d44c7b7f6c01c15628
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB1 5808 bytes
font_01_sfnt_off00013052.bin
bce7f1622c34d74493384c084a365acc4b6aecabd9ddb6e55ba28f1737f5a6ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x13052 10312 bytes