Malicious PDF — malware analysis report

Static analysis result for SHA-256 21de48e70f07c1da…

MALICIOUS

PDF

38.1 KB Created: 2020-08-05 14:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1bc9ac74ed2eba982569430d4b3d809 SHA-1: 5a13665523e9c4698173e4342414b1e6cdd8cd5d SHA-256: 21de48e70f07c1dabe13586cdeddc67ee2b816f8e0f6d746cd3cbcd7dd886917
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The primary malicious URL is https://ttraff.ru/pify?keyword=close+to+you+carpenters+chords+pdf, which likely leads to further malicious content. The document body is heavily obfuscated but contains the same URLs, suggesting a lure to trick users into clicking on malicious links disguised as search results.

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=close+to+you+carpenters+chords+pdf
    • http://files.northportcarpet.com/uploads/1/3/1/0/131070144/teserene_zoxuvab.pdf
    • http://jadapepe.agoodstretch.org/uploads/1/3/0/9/130969744/8647360.pdf
    • http://files.bearlakecounty.info/uploads/1/3/1/4/131437005/9a05bb2.pdf
    • http://files.assessormag.com/uploads/1/3/0/8/130874278/4872039.pdf
    • http://files.lincolnmarchingcougars.com/uploads/1/3/0/9/130969529/34b1d.pdf
    • https://www.amchords.com/chords/3609301
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/86712766123.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/24716195838.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/gijabeluwadejepuxebuni.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/47972952293.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/danuviviralufaniv.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/vajajin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/sekejumogilamesuxukonomap.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/30917315773.pdf
    • https://cdn.shopify.com/s/files/1/0447/9008/7829/files/cara_membuat_surat_lamaran_di.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/87280367115.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/born_2_race.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_off00005217.bin
138de2e7fe46e1c56279b8539c0ad997a60738d590468a76f44132dbcde2f6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5217 5248 bytes
font_01_sfnt_off000063f1.bin
ded856e22c0993f3ddab50fc829d167cf08ff3b7994e684c035a65dea19fbcb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 12308 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.