Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a57163c66e79fc…

MALICIOUS

PDF

128.5 KB Created: 2020-08-03 15:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5ef6bd4b8041be6c0da2f4bb6f04a34 SHA-1: 870f95bbf06b843088b57bf292922a2e4f59c69b SHA-256: d0a57163c66e79fc3a213bd2a107d370bed3c5f470d9a415f87d2cf864e445d2
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 'https://ttraff.cc/pify?keyword=artillery+weapons+pdf'. This URL is embedded within the document body, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. 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.cc/pify?keyword=artillery+weapons+pdf
    • http://files.megastarphilippines.com/uploads/1/3/0/8/130874382/1553050.pdf
    • http://files.almeria-estates-and-realty.com/uploads/1/3/1/4/131437351/fefozo.pdf
    • http://files.gillhowie.com/uploads/1/3/0/8/130874161/7898240.pdf
    • http://files.ksschoolofdesign.com/uploads/1/3/2/7/132710717/tujojukiwixo_zogetenizov_kikofepasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/miwisire.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/55334044943.pdf
    • https://cdn.shopify.com/s/files/1/0434/2326/9014/files/jomoxawutowegesatoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/busiwewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/rixofaforopowexebur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/jidaninexixejiragoxegab.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/tatagovudoperewotezedo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/tilifipepifetizibegoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9141/1615/files/ethernet_controller_driver_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0434/2389/1618/files/tozixexawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/53480896487.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/suwapulojijikazudipofib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41877136991.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_off0001a18d.bin
18c344935324fbacf3ce0e3036cca05fe382ec2f67f92e1ec3156747f81f8bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A18D 8680 bytes
font_01_sfnt_off0001befc.bin
65e62cbd68c192b9aa7280699de6520192f262db4e4f6da4d2d74c7f72feb701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEFC 5216 bytes
font_02_sfnt_off0001d0e2.bin
8000860cde473ff755980b08eeaf19206c35920883692318f4cd406d5ddf0bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0E2 10356 bytes

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