Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd9ae13336a885d…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 01:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6161ffa57b6533b373de1c354b32e184 SHA-1: 4206bba1312cde86a8a508fbddbe590f03e50f02 SHA-256: 1bd9ae13336a885d60d20347b52cb364f8eccbe21a764b6e0567b94732b80b3a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=report+builder+datediff+example'. This indicates an attempt to redirect the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility. No scripts were extracted, but the presence of the malicious redirector is sufficient to classify the attack pattern.

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.com/pify?keyword=report+builder+datediff+example
    • http://vipaxu.andryproperties.net/uploads/1/3/2/8/132814930/2500952.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/diwuwenakaxise.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9287/files/duxumesezigazu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/jurnal_akuntansi_dan_keuangan_issn.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/list_of_common_nouns_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/5060/6496/files/bootstrap_button_group.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/42147200490.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/pinafixas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4038/2882/files/81932557175.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/gokomu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/3279819265.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/movugarikinodejexefil.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_off00005f59.bin
b1abf985810f1fc400db556b15e074b0481c78cc2bb27d05229fda3a84fdf2d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F59 5224 bytes
font_01_sfnt_off0000710d.bin
a3d1c05e43c21bfae9d7e982814b13c5aefe8bb375fbf2b232b4db0115905892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 9980 bytes

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