Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33767669e2120a7…

MALICIOUS

PDF

42.9 KB Created: 2020-08-17 07:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b7ba7dc57ef7fe9b71991bd0fab46b8 SHA-1: 4c18ece78c4576f141074f951e5f70cdc07ceaa7 SHA-256: a33767669e2120a70440b5806e98e09ce614fd2df33e5578a59039510b44247c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms or redirectors. One critical heuristic identified a link to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text that appears to be a lure, referencing 'Calling you bagdad cafe pdf'. The primary attack pattern involves directing users to malicious infrastructure through these embedded links.

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.ru/pify?keyword=calling+you+bagdad+cafe+pdf
    • http://files.crankinblackbox.com/uploads/1/3/0/7/130775391/7771d8380.pdf
    • http://files.moveeasychiropractic.ca/uploads/1/3/1/4/131407274/pideve.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/lowes_leeds_al.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/mimiminivuvenovew.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/saxunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/43328518152.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/32398461796.pdf
    • https://cdn.shopify.com/s/files/1/0445/4537/6420/files/form_540-_es.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/jusolufemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/kodonazosefukujid.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7445/files/wigimefefixivegodisad.pdf
    • https://cdn.shopify.com/s/files/1/0437/5045/7505/files/2020_nfhs_basketball_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/matplotlib_multiple_plots.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b24.bin
561be9e1654a3f790241311af3ae429dd53db064dc343a1b358e4fd6e346612f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 5196 bytes
font_01_sfnt_off00007ced.bin
a49aaef0d872b985840fac6d2dada39262a798cbaee0e65205a2a312572f030a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CED 9980 bytes

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