Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd936c881587499…

MALICIOUS

PDF

53.7 KB Created: 2020-08-25 13:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccbabf1f25ec3a9f443f42ec518c0653 SHA-1: eef85e87f7b787a5142ea4df938df4a3893a56b8 SHA-256: 9fd936c88158749927d674b05e8639202c662b1e982f640fb368fdeed57c96ea
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=dragon+ball+fighterz+android+13'. Another critical heuristic identified a PDF link farm, suggesting the document's primary purpose is to distribute links to other PDFs, likely for SEO poisoning or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=dragon+ball+fighterz+android+13
    • http://files.ohenrymustangband.com/uploads/1/3/0/8/130815009/78d5f.pdf
    • http://files.readingfamilyaid.org/uploads/1/3/1/4/131453493/c94a4cd5b04f.pdf
    • http://files.afuricupertino.com/uploads/1/3/0/8/130873741/baxutale.pdf
    • http://files.briancurtinbangkok.com/uploads/1/3/2/7/132710632/401a6d8ffcba.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/88364559808.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/21563709424.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/fumemutimogezajapoge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/64421369084.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/84778611875.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/janatha_hotel_telugu_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/acls_guidelines_for_ventricular_tachycardia.pdf
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/curcuma_articulos_cientificos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2217/files/candlesticks_secrets.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_off000083cc.bin
29d795be42b73c39d054560a1c37328de91040081a545af072e4e238c84c2ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83CC 4664 bytes
font_01_sfnt_off00009420.bin
5c1692d2dfded19758b32efa063927cf132051636230b1eaf908f714263af2a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9420 5396 bytes
font_02_sfnt_off0000a678.bin
1e08551b093f4cf9c1bc1723b130fee7f724bfdf0f3e06f4bbd948cf858893c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA678 10308 bytes

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