Malicious PDF — malware analysis report

Static analysis result for SHA-256 da48ddd4cda0cbc0…

MALICIOUS

PDF

50.7 KB Created: 2020-08-18 19:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03c7d53e3271c7b33e0b8054ced4b0cf SHA-1: fa11035446cd1f1f41ddcf30f7bbf8163c8bdd43 SHA-256: da48ddd4cda0cbc0abf70ee7e00f3708ab3e3e29274b14889642d5d2d81f1505
150 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, many of which point to potentially malicious redirectors or external content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=alesis+performance+pad+olx, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a lure to external content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate malicious intent.

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/pify?keyword=alesis+performance+pad+olx
    • http://sewetok.bishopwoodsschool.com/uploads/1/3/2/6/132695569/1f70b389.pdf
    • http://files.trainconductorcostumes.com/uploads/1/3/0/7/130740213/tufugit.pdf
    • http://files.mhorakphotography.com/uploads/1/3/1/4/131410479/webedeniwapim_ravavofov_xefidawajaz.pdf
    • http://pexalu.ocfertilitycare.com/uploads/1/3/1/4/131453945/9787481.pdf
    • http://files.nakukuinetlinks.com/uploads/1/3/0/7/130775215/dupelidogegonet-nuwobagulu-bozozum-moniko.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/592741033.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5317/files/tigunonidajikelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/rmv-_1_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/tic-_tac-_toe_game_java.pdf
    • https://cdn.shopify.com/s/files/1/0437/4953/9989/files/dynamics_crm_dynamic_worksheet_import.pdf
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/sofiwus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/bisoniwixavagopepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/rekajirez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006676.bin
9505b63a1e846bae201b0536edc632e7d6634f347224a3a84b994512f18ada3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6676 5360 bytes
font_01_sfnt_off00007893.bin
ac0e9df4d60f564e4e08e80a3187a14319896e3ab8a5e0ac30689eba59324113
pdf-font-stream PDF embedded font (sfnt) at offset 0x7893 15484 bytes
font_02_sfnt_off0000a8e9.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E9 16164 bytes