Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9342f8341c71fc…

MALICIOUS

PDF

55.7 KB Created: 2020-08-24 12:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 293864f8c2d55056c9e73386ba185a10 SHA-1: 24fddee32dbcd65d4a777baf9d8a54e71fddcdc0 SHA-256: fd9342f8341c71fcbe979d017817673c0194958e840687a1cf9b46cf1807c961
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body also contains this URL, along with numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=qasidah+burdah+shareef+pdf
    • http://files.writersabodeen.com/uploads/1/3/1/3/131383934/mizetuxasopive_jamoraketerodaz.pdf
    • http://dulofota.flyingleapimprov.net/uploads/1/3/1/0/131070493/bawizexixik-zokexufuragowij.pdf
    • http://favomo.agafilmsltd.com/uploads/1/3/0/7/130740514/8152723.pdf
    • http://files.mindfulness-west.com/uploads/1/3/0/8/130874031/kiwikitenorigi.pdf
    • http://files.toomuchpun.com/uploads/1/3/1/4/131406049/vafivugufat-kebigifew-toriw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3367/files/pabepadopaveva.pdf
    • https://cdn.shopify.com/s/files/1/0435/8697/7949/files/5e_monster_manual_by_cr.pdf
    • https://cdn.shopify.com/s/files/1/0432/9970/0889/files/fepezirixibuki.pdf
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/web_browser_for_android_2._3._3.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/carpobrotus_acinaciformis_cuidados.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4068/files/cisco_2960_cx_series_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/1150/4288/files/najizoruvivili.pdf
    • https://cdn.shopify.com/s/files/1/0448/9543/6955/files/animal_pictures_and_names.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/4213782133.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009e96.bin
ec5e10424c3fa71b7fcfa1a827b4aa12e2707277837eb57f830a162b357530b2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9E96 21440 bytes
font_00_sfnt_off00006a4d.bin
69abbee978470fa97b608cf85acf8e2475563dbc6610e86bfe75566063dbb317		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4D 4884 bytes
font_01_sfnt_off00007ae6.bin
e5925bb34aa3ca0c96a1fac2bdf6c0a9de9ff7cea51e4de1e466a20ba2d3eb1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE6 10572 bytes
font_03_sfnt_off0000c3a4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A4 4324 bytes

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