Malicious PDF — malware analysis report

Static analysis result for SHA-256 1068d4aae64c10bf…

MALICIOUS

PDF

48.7 KB Created: 2020-09-05 10:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23a959b218b5683a2337cfdd7d2429cc SHA-1: 37114e27d880691a429a37c698e4aa4eb5f5dff3 SHA-256: 1068d4aae64c10bf33147e07ba1d0c5b7062eeeaaa0776b5ae53ae907b39a0e9
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/wix?keyword=arusha+peace+agreement+1993+pdf', which is flagged as a malicious redirector. The presence of numerous other PDF links, many pointing to Shopify domains, suggests a link farm or SEO manipulation tactic to disguise the malicious intent. 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.club/wix?keyword=arusha+peace+agreement+1993+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/dhakad_chhora_film_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/2301/5836/files/65135212901.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/vesivuxajuserigapinux.pdf
    • https://static.usrfiles.com/ugd/b8c837_7edd44ac085d4c6fa20bd1fb0a4a616f.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_64062db2739244308d0d4e36d3682feb.pdf
    • https://static.usrfiles.com/ugd/33a2e4_b44fc18d22b14c018c07d24d36334f7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bce31467cbd47ea8981f461cbed9cf5.pdf
    • https://static.usrfiles.com/ugd/5f226e_16abfd53f8d4417e98b2d01d0e17de83.pdf
    • https://static.usrfiles.com/ugd/3e87bf_7bc723aeb42843538a81bb52260af067.pdf
    • https://cdn.shopify.com/s/files/1/0447/4516/2903/files/ar_nosurge_ost.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/minecraft_1._13_pc_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0459/7389/7383/files/google_translate_offline_package.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/sewing_machine_parts_crossword_puzzle_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/24006938377.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_off00007319.bin
95cff5586b3e0e67509a65d1a2763d9ae27206aadb9d6de185f31e57b73cab9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7319 5624 bytes
font_01_sfnt_off00008616.bin
4c05c9eff153e8a750db26de96434e8a9027bef42c4a664268cb2da2ac796514		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8616 9928 bytes
font_02_sfnt_off0000a813.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA813 4324 bytes

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