Malicious PDF — malware analysis report

Static analysis result for SHA-256 198415167394319f…

MALICIOUS

PDF

50.3 KB Created: 2020-08-02 13:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fcd3618353814f674b6c22ae9d53291 SHA-1: 247f134438ed1edbd12671ed3c999b03247c9dd7 SHA-256: 198415167394319f4dd357d9cf6bb461b86aa5ca333e9610aa097b7c35ce0105
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with several heuristics flagging them as malicious or part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=sony+dream+machine+icf-+c318. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious content. No scripts were extracted, but the sheer volume of links and the presence of a known malicious redirector indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.ru/pify?keyword=sony+dream+machine+icf-+c318
    • http://files.newlifestylesnepelenaferraretto.com/uploads/1/3/1/0/131070625/xagatamudul-barisopopuwi.pdf
    • http://files.ardeesign.com/uploads/1/3/0/7/130776268/0b47962.pdf
    • http://files.boracaynewcoastph.com/uploads/1/3/0/7/130738603/nekokimogitur-najuruboxoz-sopup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.fontrix.comhttp://www.nhncorp.com
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/vevegixibiwolij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/rizixonezepikuxilimesetav.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/sumapanozenodanoxif.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/lazunixelokudapirapapat.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/wilamu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9426/8320/files/tilofezokijak.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/81674723657.pdf
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/wemofegexezixuretipikawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/36030891245.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/git_abandon_changes.pdf
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/80609419301.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff5.bin
6725057878630e6165efaa36f90bb66aa823b641e1159b1dc6edb148e8a69fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF5 5700 bytes
font_01_sfnt_off00008346.bin
191ee83db55e9830731a749de297590b2a2f48374a12a17f1d75adb54f78d451		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8346 2232 bytes
font_02_sfnt_off00008cdd.bin
76f066b9ad122c67e5c272f76d5db4199dc5858363eb825bc867e585ae3ca9ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDD 10916 bytes
font_03_sfnt_off0000b178.bin
f01063df4dec4aac56e61417a9825202c4cc07224ec4fc6c0a7cf81afcdd176f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB178 2468 bytes

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