Malicious PDF — malware analysis report

Static analysis result for SHA-256 07988c459b36586e…

MALICIOUS

PDF

58.4 KB Created: 2020-08-05 03:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 202abd967e493d6e59dbe0db84f1676d SHA-1: 33ee1828595711dee7078518898e4e4dcb5fdcc1 SHA-256: 07988c459b36586e676f4c1945af00e64b0b21503d73e2605307142d3c54992d
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 of which point to redirector infrastructure. The primary link, https://ttraff.cc/pify?keyword=bellman+ford+routing+algorithm+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are likely part of a link farm designed to manipulate search engine results or distribute malicious content. 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.cc/pify?keyword=bellman+ford+routing+algorithm+pdf
    • http://files.vitodorazio.com/uploads/1/3/1/6/131606642/sozetok.pdf
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdf
    • http://files.heritagecouncil.co.uk/uploads/1/3/2/6/132696483/savamumatuv.pdf
    • http://files.huettlvisuals.com/uploads/1/3/1/4/131438069/bapopejavedi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/bakizoga.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/fajiviveduwavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6835/7796/files/tolokufosazase.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/96235765932.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/45256340626.pdf
    • https://cdn.shopify.com/s/files/1/0434/3113/3340/files/74838094212.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/gemimuxori.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/zaniluza.pdf
    • https://cdn.shopify.com/s/files/1/0432/5507/0880/files/gidepubivutuz.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/word_press_ajax.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/jujasamazosugakojozol.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/88530406186.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/4chan_webm_size_limit.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b67.bin
bb0f3e2dd330bc4c1fdf6a57c09b4b8ed7b722fb7bf8520b8c2b18ffe0bf30f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B67 5912 bytes
font_01_sfnt_off00008fb9.bin
a696c30bf8f449b0d31c9fc5de5ccfb66c066786ef7feb6bc12be886ecd7cdf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB9 5324 bytes
font_02_sfnt_off0000a1ab.bin
c91f3d9c2ecf2caf51822c45d229c7b5476607f0263a84c3e4f01aa295a1b5c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1AB 11436 bytes
font_03_sfnt_off0000c68f.bin
67cb0e1a92e3c2e769412e1d7bd55252ffaccc5ac3e10b279655dc28e07d1a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC68F 16172 bytes

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