Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e962598572b5af9…

MALICIOUS

PDF

45.5 KB Created: 2020-07-19 00:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f1b5a6df8d09bc1e6ffb66f8db8ccaf SHA-1: 0d07dd3450060b90e1f51d35e0a4bc620bac0c11 SHA-256: 7e962598572b5af9aee45f22242df542575440a4d595bd73688e7185a5191844
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to WordPress hosted PDFs, forming a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.cc'. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and unreadable, but the presence of numerous links suggests a lure for SEO poisoning or phishing.

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/wb?keyword=drone%20potensic%20t35%20pdf
    • http://files.authorizedealers.com/uploads/1/3/2/8/132814611/sifijoxir_rufib.pdf
    • http://files.circusofillustration.com/uploads/1/3/0/7/130775619/2501351.pdf
    • http://files.annsjewellerycreations.com/uploads/1/3/1/4/131437736/vuron.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://mutemoxapeko.files.wordpress.com/2020/06/15767833380.pdf
    • https://walodusisig.files.wordpress.com/2020/07/96826399641.pdf
    • https://danutajozuk.files.wordpress.com/2020/07/xerafifaluwif.pdf
    • https://kolurujo.files.wordpress.com/2020/06/goluxutevudikodimuf.pdf
    • https://gadadorasu.files.wordpress.com/2020/06/39462650873.pdf
    • https://funegoj.files.wordpress.com/2020/06/mavarol.pdf
    • https://retutike.files.wordpress.com/2020/07/pameferuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/werutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/83985830759.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/nazutazazufosojedizexixif.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/budivawidopefilagete.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0023/files/44556702485.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/50600425221.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/18653923866.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/bemaninaxufudivix.pdf
    • https://cdn.shopify.com/s/files/1/0430/9870/1977/files/90127977901.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071b3.bin
95f82140027829056498015cb375d097ca02edb23fc2ba85c8cd7890f1af8ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B3 4984 bytes
font_01_sfnt_off000082b7.bin
a93f3b1ba38fbc3ca59c8b507ef8235870deeae90c7417d33b7589d467ea58a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B7 11312 bytes

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