Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d864e13b8664c2…

MALICIOUS

PDF

47.2 KB Created: 2020-08-17 05:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdb8cad75b694e89ebf72ad4a98d768f SHA-1: e3dd10f6ad897bd7b6708b04c5f78900a08faea2 SHA-256: 25d864e13b8664c2e8cdaf980dd83cdced4a09ae21701c197d2f83ce04557091
150 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 a malicious redirector at 'https://ttraff.ru/pify?keyword=citation+davis+drug+guide'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to drug guides or citations.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=citation+davis+drug+guide
    • http://files.gracebiblefellowship.org/uploads/1/3/1/3/131379117/gunedujitewu_gonegapodona_ratajagediver_kinogedejag.pdf
    • http://wapokun.altoonaenglishclub.com/uploads/1/3/0/8/130874207/lizapilo_sajoruf_lutiz_diwujidure.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/string_replace_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/autonomous_desk_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/56913252836.pdf
    • https://cdn.shopify.com/s/files/1/0429/9387/7145/files/wiwexuzazik.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/bacterial_attachment_and_biofilm_formation.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/wufiluz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/96100072752.pdf
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/lujimuje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7584/5792/files/apprendre_python_rapidement.pdf
    • https://cdn.shopify.com/s/files/1/0448/2488/7456/files/tutorialspoint_c_programming_version.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/xubuputojasajama.pdf
    • https://cdn.shopify.com/s/files/1/0433/5599/6328/files/14913965191.pdf
    • https://cdn.shopify.com/s/files/1/0432/8715/0752/files/raninuxoxivapafaj.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_off00007866.bin
a7d4c3bcc841e92f3874585cae2ccd0716d2b339dbb23a7e9d7962efdf3b38c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7866 4924 bytes
font_01_sfnt_off00008937.bin
cce3e2b680ccfb71c2c1faa815da13375c2e77a9e9bf57cc2a0f42cbd79572d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8937 11636 bytes