Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66d9d2afa22fdc0…

MALICIOUS

PDF

51.8 KB Created: 2020-08-10 22:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bafce6712e5cf189683ac1475af91164 SHA-1: 0ea69ccee723d9b64a96afe9ea8b625916b6a926 SHA-256: b66d9d2afa22fdc013097be46cc36e1653e3914f5bd84592c6ab6c9f98cfb349
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the malicious intent.

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.com/pify?keyword=pravastatin+davis+drug+pdf
    • http://files.mobilessurvivors.com/uploads/1/3/1/3/131384791/acd5d32.pdf
    • http://files.doggiestylezllc.com/uploads/1/3/1/4/131453784/bovinifula_mazemudiwunote_sibikijaj.pdf
    • http://files.badgerbuildingmover.com/uploads/1/3/0/7/130739564/sukebatufulotexepi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0025/files/ponopolikepevunuve.pdf
    • https://cdn.shopify.com/s/files/1/0443/2723/9836/files/fusion_360_for_linux.pdf
    • https://cdn.shopify.com/s/files/1/0449/2853/2635/files/anonymize_file.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6135/files/world_map_without_labels.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/75066369704.pdf
    • https://cdn.shopify.com/s/files/1/0433/5517/7109/files/pupoxonufenata.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/bimubaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/4487/1080/files/87663230515.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/68498967352.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/19484946871.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/gemadakifo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4981/files/31307545850.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37741658126.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066a2.bin
f8885fa7e2168477348ca898f488b454202005b0ea1398291c7154160f6d7223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 4892 bytes
font_01_sfnt_off0000773e.bin
d91fc08d61b18e18235c425483121d39b1de1197f0e66d05960c9401ed0542fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773E 11464 bytes
font_02_sfnt_off00009eb4.bin
71965a19a7f9335088809374b0d641e6d4a160bd395340b351c68b22b5e6656e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB4 16160 bytes
font_03_sfnt_off0000b3c5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C5 4324 bytes

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