Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9ffec6f35cf18a…

MALICIOUS

PDF

40.2 KB Created: 2020-08-28 19:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e971cc30d70003eea270b9ef7991e3f5 SHA-1: 7f20f80f4eb3ff77dbe9bca34f11a45b51d2e8e0 SHA-256: 2d9ffec6f35cf18ac445238f235f0b708db04d751c94d1507e13ebef099a242e
154 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, specifically pointing to 'https://ttraff.cc/wix?keyword=age+of+empires+2+lan'. This URL is presented within the document body, likely as a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs hosted on cdn.shopify.com, though most of these appear benign. The ML classifier strongly flags this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector suggests a phishing or social engineering attack.

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=age+of+empires+2+lan
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/sojatisirabex.pdf
    • https://cdn.shopify.com/s/files/1/0435/8737/1171/files/orion_pit_bikes._com.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/tavezomek.pdf
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/bazamebozulul.pdf
    • https://cdn.shopify.com/s/files/1/0437/1926/2363/files/alleluia_le_seigneur_rgne.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/87609046909.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/gun_plans.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/debizo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7829/files/6928897430.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/conway_corp_tv_channel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/40210545476.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/cookie_clicker_tampermonkey.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/33863956830.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_off00005fce.bin
ec031824361c421837aa9d7a7b9faa6655a090f70ac2685e5f73a7c997383849
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 5340 bytes
font_01_sfnt_off000071eb.bin
584cc70e855588ded5d443697574a332e24040ecaaea220949275bffcbf5694f
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EB 10188 bytes