Malicious PDF — malware analysis report

Static analysis result for SHA-256 f249eb8a58768162…

MALICIOUS

PDF

46.4 KB Created: 2020-08-21 07:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2148f44ac456d05e30badb5286d7a6f9 SHA-1: a5368d43d5fb04a7a9f1da084d4cba59a9e7262a SHA-256: f249eb8a587681626fbb17eb44567e2b05fabc8d4eba221b76d1a1e3310489d7
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a game mod guide and a URL that appears to be a lure. The primary malicious URL identified is https://ttraff.com/pify?keyword=fallout+new+vegas+willow+mod+quest+guide, which is likely used to redirect users to further malicious content. The presence of numerous Shopify links suggests an attempt to blend in with legitimate content while hosting malicious redirects.

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.com/pify?keyword=fallout+new+vegas+willow+mod+quest+guide
    • http://files.mirrorpayroll.net/uploads/1/3/0/8/130873943/tixuxepupo.pdf
    • http://www.newvegasnexus.com/downloads
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/56864902062.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55166802931.pdf
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/38021833731.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/duloravomamet.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/muwefupebedepojidu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8158/7095/files/44745347745.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/86497321320.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/zodufomemejuxexedatokuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4201/files/24236650018.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/jofaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/acta_constitutiva_de_una_constructora_en_mexico.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_off0000753c.bin
4248d0a8fd97a8e3c3c970ca44535b459762633adbb0aa073a5602017fb27419
pdf-font-stream PDF embedded font (sfnt) at offset 0x753C 5280 bytes
font_01_sfnt_off00008738.bin
99b90ddbe31c98bd9f689f88d46fbb29bb249e03a1abc05c97e40717782b0098
pdf-font-stream PDF embedded font (sfnt) at offset 0x8738 11112 bytes