Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7349e150120bf11…

MALICIOUS

PDF

47.5 KB Created: 2020-08-20 08:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6da0ed4fef86cfa8f4479a165114a6d SHA-1: 7654684b453b8e5ba41c7de4596e8a58f6b44cae SHA-256: f7349e150120bf1192f2cca855b17b46de0462802b4322450cbd91c1e40eaa8a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring users to a malicious site via the embedded link.

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=bhojpuri+video+hd++2017+pagalworld
    • http://rexunami.katarinatuffvesonjensen.com/uploads/1/3/0/7/130739615/pokibigunefig.pdf
    • http://gonix.webuyjunkcarstrucksvansingeorgia.com/uploads/1/3/0/7/130776433/a01643.pdf
    • http://files.nysaafg.org/uploads/1/3/0/8/130874295/xiseribazumem_xemunuzel_jopiji_mirirexa.pdf
    • http://files.rpcrentals.com/uploads/1/3/0/7/130740547/9357424.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/sizus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/junejovurakabezidosixer.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/13591047575.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/sixunomaxijajig.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/zalgo_text_generator.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/ebay_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/diketakefuvobanewitovi.pdf
    • https://cdn.shopify.com/s/files/1/0451/0508/6616/files/journal_of_statistical_software.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/28_glaubenspunkte_adventisten.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_off00006a59.bin
235e0fcae87abf373b1853f899d680f908a8bf0668c6576f98a1a98081181ea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A59 5728 bytes
font_01_sfnt_off00007dfb.bin
b4e8d1db7b471a433f9297f9ef3fc2d8b8bc8c83f53d96b345de4a2cc981b026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFB 10084 bytes
font_02_sfnt_off0000a0bf.bin
9292d965394d03cd0adf6936742e83f3be6dafe3e6f8fac4aafa97a06b6d7edf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0BF 4304 bytes

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