Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7ce98a20411d33…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 02:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39b4d72ed446c24922515e52d89d0040 SHA-1: 0530a9ff14538d35c0155df4a35b589518f6cbbd SHA-256: 5b7ce98a20411d3376367bb891554a4a720ce09b202229e4673c75e7a3a94b7b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify, but one critical link redirects to a known malicious domain, ttraff.com. This suggests the document is designed to act as a link farm, potentially leading users to malicious content or phishing sites. 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=gravimetric+analysis+of+a+metal+carbonate+pre+lab+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/laporan_pendahuluan_fistula_ani.pdf
    • https://cdn.shopify.com/s/files/1/0440/3675/1525/files/28090194886.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/80019785677.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/zogesegirexibonazewipama.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/44139696044.pdf
    • https://cdn.shopify.com/s/files/1/0432/1941/9291/files/formal_command_sentences_in_spanish.pdf
    • https://static.usrfiles.com/ugd/de3d83_e8521d260f4445beb561d1a34ac23004.pdf
    • https://static.usrfiles.com/ugd/b8c837_facd8f0f98a144e2b13d908f4d4011ff.pdf
    • https://static.usrfiles.com/ugd/fef806_ae6a68d4c61c47b0af38e66e8b4380cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_79205009721042c7a088d05b4efaf80a.pdf
    • https://static.usrfiles.com/ugd/b8c837_33ed2aa250824ee2b529c83309b153c1.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_f5fb9ace05ac4fe6a35133a1901db63f.pdf
    • https://static.usrfiles.com/ugd/6f58fb_aa7176abbbc84aaf8af6ad0828a1af76.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_cd03ef672f3843e1b207bb03155c318b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5f6dfe210794c2e96f1f9578585724d.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_off000053cc.bin
07418efc9d9cf15a45400bf40e880648880dc55100198ee197bdfab6c520861b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53CC 5376 bytes
font_01_sfnt_off00006614.bin
c6aa8320d20c5795a4c8b83a4d4de802374bc2b1c58573f74afdbfca30227805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6614 10060 bytes
font_02_sfnt_off00008835.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8835 4324 bytes

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