Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7b95c24921d432…

MALICIOUS

PDF

55.8 KB Created: 2020-07-09 22:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b95ab677b2b94f7459074d4db9f9d5fc SHA-1: c4c84501406480f1ad7a40e771b26c9844b1e778 SHA-256: fb7b95c24921d432cb031efd9e11c60183db1ad79e93bde78bca9e19a3ab65a6
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector link to ttraff.cc, indicating a link farm or redirection attack. The document body, though heavily obfuscated, contains the same lure text as the initial redirector URL, suggesting the primary purpose is to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wb?keyword=flame%20photometry%20and%20atomic%20absorption%20spectrometry%20pdf
    • http://files.randallcb.com/uploads/1/3/1/6/131606335/duseleje.pdf
    • http://files.colonelscup.com/uploads/1/3/2/6/132681448/5775508.pdf
    • http://files.bingocompany.net/uploads/1/3/1/3/131379612/d2857f2095895b.pdf
    • http://files.stayinginvienna.com/uploads/1/3/0/9/130969154/558974.pdf
    • http://files.bonneygirlphotography.com/uploads/1/3/2/6/132681204/sapoxorufewodod.pdf
    • http://files.battambangparish.org/uploads/1/3/2/6/132681002/d767baf407e6.pdf
    • http://files.amoriandassociates.com/uploads/1/3/0/7/130740573/6964057.pdf
    • http://files.bbbhoneyfarm.com/uploads/1/3/1/0/131070765/3160390.pdf
    • http://files.agapeministry.org/uploads/1/3/0/7/130739069/1926322.pdf
    • http://files.fc-ail-training.com/uploads/1/3/1/8/131871488/ruzarisabaxuguno.pdf
    • http://files.busybeeorganize.ca/uploads/1/3/0/9/130969004/gojebifazalomo-maxurapokenoxo.pdf
    • http://files.kspaceonline.com/uploads/1/3/1/3/131380868/b7e90.pdf
    • https://ruvirimijoxi.files.wordpress.com/2020/06/35773963179.pdf
    • https://zaxogetareko.files.wordpress.com/2020/07/rabiratagokiwizixafifot.pdf
    • https://wesobitid.files.wordpress.com/2020/07/tisiwokeronivip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muzaloxebomasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.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_off00009d0a.bin
730083c1c4fb9a98833498d745f29a19e4970240718f1574d937f7788bc63a03
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D0A 5380 bytes
font_01_sfnt_off0000af2a.bin
500eb3a41997ffb77e9a3a9032953d218575fc9179aebfdff108fbcb938f6f3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2A 10156 bytes