Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfb60006f24e1bd…

MALICIOUS

PDF

46.8 KB Created: 2020-08-15 03:14:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33d3d83134e7832407011570b6313cc7 SHA-1: 083f20c2d59d295a5227f375c6bb8494f5c6645b SHA-256: 2bfb60006f24e1bdae94af15e1fb5de470dff208341d0006a7ba45c3771cd0d6
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to sheet music and the malicious URL. The presence of a malicious redirector suggests an attempt to lure the user to a harmful site, likely for further exploitation or credential harvesting. No scripts were extracted from this sample.

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/pify?keyword=cotton+candy+skies+piano+sheet+music
    • http://files.patriciamauceri.com/uploads/1/3/1/4/131438459/8148933.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/150_best_minimalist_house_ideas_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/furupokexopaxabisovijuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/51087450350.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/18762280224.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/gasakelusujet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/bivariate_frequency_distribution_example.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/rejegud.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/xosuwowavofelufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/19454249552.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/morovimekegunugodoruzore.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/meniwafu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ba.bin
434634af779a0d15b84091101fa13ea175ca7fdaaf0f029660980d76fbbcae99
pdf-font-stream PDF embedded font (sfnt) at offset 0x62BA 5256 bytes
font_01_sfnt_off0000747f.bin
c225c052a128fecc9fd679a5887f4fdec841847128e43d8ed9b9b8bac9200071
pdf-font-stream PDF embedded font (sfnt) at offset 0x747F 10832 bytes
font_02_sfnt_off000099c4.bin
73f6f760a67782f27700c3ed047511a210a1e3765a9cc4fd416c63ff6a2522af
pdf-font-stream PDF embedded font (sfnt) at offset 0x99C4 16060 bytes