Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b8b6e9ea040900…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 20:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ebae18bd996581125b72d5fa033e6c2 SHA-1: 7dd9bf2bc87efa31df4781b8893f4290fd5cc7fa SHA-256: 85b8b6e9ea04090064b2eed6c936c2bc0ba1466325ad9919cfac807a20da7a30
120 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a download for an 'audio booster'. This link points to 'ttraff.com', which is known for redirecting to malicious sites. The document body, though heavily obfuscated, contains the same lure text and URL. The presence of numerous other PDF links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility.

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=audio+booster+for+windows+7
    • http://sufugefod.actionpestnm.com/uploads/1/3/1/3/131384284/fegibexetemore-gidoru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/75359983790.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/23906717701.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/homebase_plastic_dust_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/how_to_use_airshou.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/convertir_chiffre_en_lettre._xla.pdf
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/berokivomer.pdf
    • https://cdn.shopify.com/s/files/1/0437/8961/5266/files/vutunifuwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/ronasegezasajizijurupisar.pdf
    • https://cdn.shopify.com/s/files/1/0437/8551/9255/files/biology_class_10_icse_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/bibijog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/11402211078.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/linutato.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/simufotoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0246/1351/files/introductory_chemistry_7th_edition.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_off00006fb2.bin
5e67400d566a67d869930d56e5c093250b3353d3008e141b18239e4ea0fcc7bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB2 4960 bytes
font_01_sfnt_off000080b8.bin
3a347ea94e996b7ad237532538a406492d16dff68b44d4dcca539c77f79fd5d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B8 10004 bytes

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