Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad258b21dea02b2…

MALICIOUS

PDF

67.8 KB Created: 2020-07-29 09:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5051e333586622919a5e0470e8efcbf8 SHA-1: cb9ea28fc5bb3f9d9bf3acaeacfdc8af5762757d SHA-256: 3ad258b21dea02b220fd4caca624a19c8a1fdfdcdfc02ae1019b039812ef5d7b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=abp+news++samachar'. Another critical heuristic identified it as a PDF link farm, with 28 external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains text fragments related to 'Abp news samachar', suggesting a lure to disguise the malicious links. The primary attack pattern involves redirecting users to potentially malicious sites.

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.ru/pify?keyword=abp+news++samachar
    • http://files.mjlpa.us/uploads/1/3/0/7/130775840/2059955.pdf
    • http://files.perfectbreakcaravans.com/uploads/1/3/2/7/132740270/zenari_tiranibapo_wukilepanese_kedafamowugiwom.pdf
    • http://files.ltfdelmarq.com/uploads/1/3/1/3/131380397/4609716.pdf
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xidegafizupewutuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3968/5799/files/85882965913.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6821/files/ziraritokoji.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/94927741640.pdf
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/65105707701.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/5468693790.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mabiwabupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/22097798409.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/15462248746.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/difidudexujoteb.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/
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0000dd4e.bin
e27922c212334505a70c638d96c6e161e82a9a56469b428fc602a231cba3cecd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDD4E 11380 bytes
font_00_sfnt_off00007e44.bin
b0ae461ae624b0a00b4816712e8dd1f7ac2a9fa4bd12f36dc88db87367525caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E44 4912 bytes
font_01_sfnt_off00008eb0.bin
c452e88d674196cb3a52c671078609de993788fbd56efc1e2420c03b6ac1867e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB0 5080 bytes
font_02_sfnt_off00009f10.bin
489c7ceadf9f3328ad98f054962dec7704ccdc8940875847559a14f8a5dfdb42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F10 3268 bytes
font_03_sfnt_off0000ac2b.bin
7f4c89dad21154c95f85baede2448595051a38a94bf04f5b4590135a805bb1e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2B 4720 bytes
font_04_sfnt_off0000bb11.bin
3c4978c431c12f2ca94bfcd6698204587e56d4504be37c01dc26de00ec1c56ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB11 9924 bytes

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