Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aca98a79b378764…

MALICIOUS

PDF

63.7 KB Created: 2020-08-30 11:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 235679466a63fe9b3cd9d3ab49c5a424 SHA-1: 86fc58a98293e004b208599c5b87acba2835282f SHA-256: 1aca98a79b378764fa9a2a92b1692bab2dc95611f64c6ed014832c5c67fd238f
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 pointing to 'ttraff.cc'. This URL is likely the primary mechanism for delivering a malicious payload or leading the user to a phishing page. The presence of a large number of external PDF links, while some are benign, suggests a link farm or SEO poisoning tactic to obscure the malicious destination. The ML classifier also strongly indicated maliciousness.

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=mercedes+lackey+torrent
    • https://cdn.shopify.com/s/files/1/0432/5035/2296/files/98844417298.pdf
    • https://cdn.shopify.com/s/files/1/0437/1985/2200/files/paradigma_penelitian_kualitatif_dan_kuantitatif.pdf
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/making_a_google_sheets_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/dizuzalefefebavuraz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/11223803508.pdf
    • https://static.usrfiles.com/ugd/15ebe2_d3940d5c6b1a45de894619f52c096b56.pdf
    • https://static.usrfiles.com/ugd/f0f215_4f38011c415e43e7a3bbb22b5225472a.pdf
    • https://cdn.shopify.com/s/files/1/0455/7953/4501/files/82599130044.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/golang_write_to_file.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/bafg_anlage_1_formblatt_1_ausdrucken.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/nivaguzorusuzabisuwe.pdf
    • https://static.usrfiles.com/ugd/e4ff69_e18b30f98fdd456287b3c5383802a9be.pdf
    • https://static.usrfiles.com/ugd/b8c837_324515305199475094a32b4d83eec13b.pdf
    • https://static.usrfiles.com/ugd/e5a943_74e558c62e2e4e1e8f5f3bf9a1fa03aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_570843dfa00848aa8f001642ff081495.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f13.bin
2168fbebfde0a20a78f2dbd5a6de170085e7daf21063d21b3717d6a284c29687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F13 4844 bytes
font_01_sfnt_off00009fa4.bin
8108bec008889d27f960f0cb736b79cf9a214d1d2f09e557e410d10bbf13aa37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA4 14728 bytes
font_02_sfnt_off0000cdd8.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD8 16204 bytes
font_03_sfnt_off0000e306.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE306 4324 bytes

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