Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2b9e74333e6569…

MALICIOUS

PDF

46.0 KB Created: 2020-08-27 18:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a500b74595694a55e0e953e882d52a43 SHA-1: 9660eb7e9059d17ca97f2e6d14bed250694c6e86 SHA-256: ae2b9e74333e6569131b9280a39fadaf63a94cbdceaaeda51f5c6d13dd635307
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=samsung+ht+bd1250'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The document body, though heavily obfuscated, contains the same product keyword and the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=samsung+ht+bd1250
    • http://files.mychinesewatch.com/uploads/1/3/1/4/131406629/cf526fee.pdf
    • http://files.akadeltapsiomega.org/uploads/1/3/2/6/132696274/nasubetoki.pdf
    • http://files.yogawithsarah.org/uploads/1/3/0/7/130776041/runitubiwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/75767157379.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6510/files/form_llc-_12.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/world_political_map_high_resolution_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/zosikokosivajorapomegixi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/44992180583.pdf
    • https://cdn.shopify.com/s/files/1/0438/8821/4171/files/2d_arrays_c.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/dojudufevizujepome.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/58450635416.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_off000075a9.bin
419d7cfe4c1992081703a2017934977b923727f592626464fd372fcadb952095		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A9 5804 bytes
font_01_sfnt_off0000893f.bin
1be3068482bb11cabea4f009caa4a8a43181c466b0ce47652352a67166d11d5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x893F 10144 bytes

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