Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e80e08331a09d6…

MALICIOUS

PDF

40.8 KB Created: 2020-08-27 16:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62fc729034fc5f035181eee0fcdd6dea SHA-1: 7575155fed6bfb67b1ab01e4e899a32209ac74dc SHA-256: 68e80e08331a09d6b2a43a167233fde4eee4fa523c7774b9b0faff68729da6a3
154 Risk Score

Malware Insights

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

The PDF contains a lure for free ringtones, which is a common social engineering tactic. It embeds multiple links, one of which, 'https://ttraff.ru/pify?keyword=download+free+ringtones+for+staying', is identified as a malicious redirector. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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.ru/pify?keyword=download+free+ringtones+for+staying
    • http://files.jftsd.com/uploads/1/3/1/8/131856723/9494886.pdf
    • http://sowosiwuz.gcpageants.com/uploads/1/3/2/3/132302782/fobunewo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/6266899147.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/48190817669.pdf
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/88992252561.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2246/files/the_art_of_travel_alain_de_botton_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/8778098714.pdf
    • https://cdn.shopify.com/s/files/1/0428/0107/0247/files/22577591586.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6164/files/31975739748.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/19224789313.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/tivekulusixugagobapuwuje.pdf
    • https://cdn.shopify.com/s/files/1/0437/9846/2624/files/nozisevix.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/39418908607.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/14185624845.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_off00006174.bin
0cc6903ad1aec954c413753b5456511fed1430398c6a8db0f7682e6b25f059f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 5268 bytes
font_01_sfnt_off00007389.bin
f722eacb4df0016e47efc2837b7e2e4d574928faaf60306ed957b23aaa326314
pdf-font-stream PDF embedded font (sfnt) at offset 0x7389 10240 bytes