Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3052f658eee97f4…

MALICIOUS

PDF

56.9 KB Created: 2020-08-06 22:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67df69acb57cb5a14f2a542151aa7b2e SHA-1: fed947a003df04ff5b853cd4b8a10da34f0ac641 SHA-256: b3052f658eee97f41fa208be20edada73c37d3612d09c4aecd8257052122dcde
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to 'Kunduz province map pdf' and the malicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many hosted on Shopify, suggesting an attempt to disguise malicious activity within a large volume of seemingly benign content. 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.com/pify?keyword=kunduz+province+map+pdf
    • http://files.sunstarnurseries.com/uploads/1/3/0/8/130813860/7913496.pdf
    • http://files.symmetry-careers.com/uploads/1/3/0/7/130738696/4a2c3186593f6a.pdf
    • http://files.thepathofservice.org/uploads/1/3/1/4/131438604/4007641.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/sajabejiz.pdf
    • https://cdn.shopify.com/s/files/1/0449/8151/8494/files/integral_calculus_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/fanafufuromebakulevepami.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4367/files/wifaranadirijedixozejamu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/vehicle_tracking_system_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/4792/5413/files/basic_hematology_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4501/files/79362123933.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faramerujinusopuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/php_rename_files.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/79749842542.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/kofukuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6741/5457/files/retail_marketing_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/19093072000.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000add5.bin
100e92cff1c4df4a31dd7d2fb01b1efa5f10bb7023e7d79af6bf8163e50049bf
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xADD5 17240 bytes
font_00_sfnt_off000075b9.bin
c8d5537af6a1077899849a3594df1f3079003a36a7bbef65a030500979ffc136
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B9 4972 bytes
font_01_sfnt_off00008691.bin
be0a9349a2de75247987c46a28f758cffe30dd891f19d2a1954a826cfd21602c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8691 12020 bytes
font_03_sfnt_off0000c6f6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F6 4324 bytes