Malicious PDF — malware analysis report

Static analysis result for SHA-256 90da197c3970b35e…

MALICIOUS

PDF

67.0 KB Created: 2020-08-30 15:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f84beea0d6b4452d2b9b3f92611b243 SHA-1: 2c65fe0feae162a705d0ac2f7289d25d2489bbee SHA-256: 90da197c3970b35e490786e0d2b4056b6f868d96bb19b528b3bdcd28c36a090b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wix?keyword=cards+against+humanity+4th+expansion`. The document body, though heavily obfuscated, also contains this URL. This indicates the primary intent is to redirect the user to a potentially harmful site, likely for phishing or malware distribution. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to mask the malicious 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.cc/wix?keyword=cards+against+humanity+4th+expansion
    • https://static.usrfiles.com/ugd/79e0dc_86bab1ab4a97452c8064453c18c0d66a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9de39514f661457f85d44fcf7b7d49b6.pdf
    • https://static.usrfiles.com/ugd/b50c55_01220c53cb2244ba94f3265c8997767c.pdf
    • https://static.usrfiles.com/ugd/b8c837_520995f7c83043e6beb2708b454780a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6f03430e028479785e094f60b1fd64e.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/que_es_robotica_educativa.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7078/files/fizuxodibewurizokalokunib.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/budget_speech_2019_zambia.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/wonulin.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/49159743023.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8729/files/gofubaleligagik.pdf
    • https://cdn.shopify.com/s/files/1/0440/3698/0886/files/83141610808.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/55562267612.pdf
    • https://cdn.shopify.com/s/files/1/0430/4997/5961/files/81316746132.pdf
    • https://cdn.shopify.com/s/files/1/0429/0969/6156/files/21412096616.pdf
    • https://static.usrfiles.com/ugd/b8c837_7254b13464f7453bb03adde8555a7a0a.pdf
    • https://static.usrfiles.com/ugd/8de238_0602642362bf4770aa6379eb67116747.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd03e560193044e4bcfee886cde2587f.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_off0000b154.bin
fd0cabf01b7746674cea4443168555e0bdea9668dee0ee34de0d1180d0da3b7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB154 5504 bytes
font_01_sfnt_off0000c3ed.bin
08cd56d222b1bcd689c9b4e232ba938400685c657b1903e968c402b0d670ddee
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3ED 10900 bytes
font_02_sfnt_off0000e97e.bin
2fa31e69395f6813569a5d1a4af99f56de7f65b7db503e1fc38a7f47540655ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xE97E 16072 bytes