Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de4659de0ccb719…

MALICIOUS

PDF

45.4 KB Created: 2020-08-22 06:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ebca8184c745e6ca6d6aedd00538be6 SHA-1: 4f22940a41ab93d81b055f4995ce779134f10067 SHA-256: 8de4659de0ccb71929e7ec48f92d108eb40c67b1cb7f66cad191e51bce63b53a
120 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Texas parent taught drivers ed answers' and embeds a mass of external links, many of which point to Shopify domains hosting other PDFs. One critical heuristic identified a malicious redirector link (ttraff.cc) which is likely the primary payload delivery mechanism. The document body, though partially corrupted, contains the malicious URL and appears to be a social engineering attempt to trick users into clicking it.

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.cc/pify?keyword=texas+parent+taught+drivers+ed+answers
    • http://sixidoxo.lisastory.org/uploads/1/3/2/6/132682347/lubutupozadodisitu.pdf
    • http://files.ballyhoo.ca/uploads/1/3/1/4/131437632/6db21f.pdf
    • http://files.frenchifiedforlife.com/uploads/1/3/2/3/132303219/4496326.pdf
    • http://duwezidap.mylivgrace.com/uploads/1/3/2/8/132814930/tovosopuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/8063/8879/files/brothers_grimm_stories.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/26632112102.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/niwiponuzizigujikal.pdf
    • https://cdn.shopify.com/s/files/1/0457/6591/8884/files/jobasojesexiwovusixiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/6089/5650/files/zones.pdf
    • https://cdn.shopify.com/s/files/1/0465/1486/4286/files/19073084562.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/rodoruxib.pdf
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/45927400295.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/dozesuroxerezasunov.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/naniwetafiforine.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_off0000710e.bin
0f454ce5f4d30099ad508fd432cce8143bf6e851df373d67cd9652db761e4427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710E 5360 bytes
font_01_sfnt_off0000835b.bin
dd6440bf5c29bc9e587bdfff0e74cd25250711d8c81ef87bb3ea7123bbcdd21d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835B 10980 bytes

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