Malicious PDF — malware analysis report

Static analysis result for SHA-256 190901109dbb4118…

MALICIOUS

PDF

50.3 KB Created: 2020-08-31 16:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f7fc6cc6da03b30679b9e8cbc3658c7 SHA-1: 68ffa9ca1daf18f89e2aeff411996655b09b0ab7 SHA-256: 190901109dbb411887424ec7bdbe132194f680e91fe48c6ab2cc57a1f5266eed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=ark+aberration+mushroom+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/1945/7944/files/94035619091.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/88971005399.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/gesuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/open_in_visio.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/android_studio_3._4._2_logcat.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8f9b1f3727c49e0a214c508011206bd.pdf
    • https://static.usrfiles.com/ugd/18122d_25d9efc1069447c38cbdf0b4eac9a3b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ded60dd0c584327880d28d0f3112874.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b3d2e4acaca41d0aa66ff906e5fabe5.pdf
    • https://static.usrfiles.com/ugd/d162e3_ebdf5810be34426aab9079ed1618ccf2.pdf
    • https://static.usrfiles.com/ugd/822ecd_8e23a71de3244593a1b8af54a376c3e6.pdf
    • https://static.usrfiles.com/ugd/95089d_8ae8779788b745f3871fdff1ccb305e4.pdf
    • https://static.usrfiles.com/ugd/8cbfce_b6f8cce8329b414ca05f9b299b0d8dd0.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_05d9f66f852c440f975a3a20752dfabf.pdf
    • https://static.usrfiles.com/ugd/b8c837_897adf9c4edd4691803fa37a7a654b2c.pdf
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/chatrapathi_movie_audio_songs_ing.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/miligibagil.pdf
    • https://cdn.shopify.com/s/files/1/0437/1247/9382/files/38002087135.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/712918393.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/74300858643.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007afb.bin
fba1d55f0f4a8d6f43d831ea532a5a3941faa3648980fb75df616fb346720e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFB 5400 bytes
font_01_sfnt_off00008d22.bin
fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D22 2140 bytes
font_02_sfnt_off000096fc.bin
f38ed755f758cc5a3e495b3930890f46823b9ddedaa7af21930a11b6bc50427e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96FC 10816 bytes

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