Malicious PDF — malware analysis report

Static analysis result for SHA-256 9356d4921ab78820…

MALICIOUS

PDF

62.4 KB Created: 2020-08-19 12:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2cc3fe859ee918b01b66fbedf8fcb82 SHA-1: 12ac0b8c7c509d6fd6815775a873e30f7d15b1e9 SHA-256: 9356d4921ab78820d98d1584f176dba7d386d5bbaa4605f2a2d4db5a38422ade
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is flagged as malicious. It also includes a large number of external PDF links, many hosted on Shopify, likely as part of an SEO spam campaign to improve search engine ranking for malicious content. The document body contains obfuscated text and the malicious URL, indicating an attempt to lure the user to a harmful site.

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.com/pify?keyword=cirrose+hepatica+fisiopatologia+pdf
    • http://tuvetofuj.zacksteam.org/uploads/1/3/2/7/132741334/xanuxularalabotur.pdf
    • http://files.subtek-music.com/uploads/1/3/1/4/131438018/e673f6cf505.pdf
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/kinamij.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/new_bhojpuri_video_hd_2019_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/dialectical_behavior_therapy_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1001/files/88904352723.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/javascript_is_array.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/sine_cos_tan_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/99692003148.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_off0000b72f.bin
51f424d4cf4cadbf30797d0b1881baecb0d88eb36d0db636af8138186fbfd50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB72F 5320 bytes
font_01_sfnt_off0000c93b.bin
349405bed00ab0ae35b7b53b55732ef2504acf455ed15f4c7163a507bedf8fb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC93B 10376 bytes

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