Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c8753cf2a98be7…

MALICIOUS

PDF

40.0 KB Created: 2020-08-30 01:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c796a561d5dc1b0c685e62c2289b7fdd SHA-1: 7c449d464511d724f930e094531622a119c793bf SHA-256: d2c8753cf2a98be72cc02841e6be30dc5f0ff285ad49e629e419f32e3115c182
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=plus+value+comptabilite'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0435/6676/0095/files/xezonuvuguzovezunowak.pdf'. The document body, though heavily obfuscated, also contains these URLs, suggesting a lure to external malicious content.

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/wix?keyword=plus+value+comptabilite
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/xezonuvuguzovezunowak.pdf
    • https://cdn.shopify.com/s/files/1/0429/1297/2963/files/56861446930.pdf
    • https://cdn.shopify.com/s/files/1/0436/4517/3910/files/43088549653.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/romasosenadelixugigon.pdf
    • https://static.usrfiles.com/ugd/de60da_d2270a7a4e554e1bb484607523a58f8b.pdf
    • https://static.usrfiles.com/ugd/735189_3ff0331145794d2a9f9948ac16b7dc6e.pdf
    • https://static.usrfiles.com/ugd/4bb894_31f59b58a8b1459a8d5e80ce070e1764.pdf
    • https://static.usrfiles.com/ugd/87a178_b4732ec580614e299f303c8e517516c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7623674079ae4d38a386c18a331a61c8.pdf
    • https://static.usrfiles.com/ugd/b42fd6_64fa1f77c8e648d8b053512da30db695.pdf
    • https://static.usrfiles.com/ugd/b8c837_89a4ea3ff8a14ee09f582ce94b139d16.pdf
    • https://static.usrfiles.com/ugd/bb13a2_513971d2782041d7abaf1adc361bfed1.pdf
    • https://static.usrfiles.com/ugd/b8c837_994f6c6b3b334ceca66ad99599072445.pdf
    • https://static.usrfiles.com/ugd/8acad3_5f357126f2ae4378a68eed3921009920.pdf
    • https://static.usrfiles.com/ugd/51c472_4719c555b9f84f26aeccf50ca12249f1.pdf
    • https://static.usrfiles.com/ugd/6116da_eee443aa47c2444fab3479c965683dcf.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f87.bin
2a490b25f4aba1c40901cb404957df57348e1d1ee017c321457f844f21d3cfda
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F87 5184 bytes
font_01_sfnt_off00007119.bin
7121ffe826954dd2455f1db934e594ab4ba60298526097b80fd6893508c241c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7119 10080 bytes