Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f6f7908ba4d7e5…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 00:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf30a1d5e1ab00eb5e8e0f2607c65b4a SHA-1: d5de0ba4571085f286061724f511a32e4a2853e9 SHA-256: b0f6f7908ba4d7e5862f9df107c0cbff88e6f962a391c10a69b5d5da4183668b
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for the malicious link. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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=golden+barley+hotel+gig+guide
    • http://files.jgmckenney.com/uploads/1/3/2/6/132695707/ee316c917099c.pdf
    • http://lubilepi.geoffsholler.com/uploads/1/3/1/0/131070718/ludojamet.pdf
    • https://cdn.shopify.com/s/files/1/0451/3647/8361/files/celebrations_around_the_world_reading_comprehension.pdf
    • https://cdn.shopify.com/s/files/1/0462/3961/3079/files/62395396459.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/xijexebamuvul.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/catechism_of_the_catholic_church_complete_and_updated.pdf
    • https://cdn.shopify.com/s/files/1/0439/1567/3752/files/jizifisute.pdf
    • https://cdn.shopify.com/s/files/1/0440/3183/6310/files/gba_ios_8._3.pdf
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/wusugubaxuzetiwag.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6006/files/xinevazabinevosevubukal.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_off00005054.bin
29e2050baaaf61681f76cbfc21be5ca148414521139bae78d54a610718289f42
pdf-font-stream PDF embedded font (sfnt) at offset 0x5054 5064 bytes
font_01_sfnt_off00006189.bin
567963eb8dfc141d7a6991362883fcc166bd22c2afa7824b58cfa8c20f703eba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6189 10316 bytes
font_02_sfnt_off000084d9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D9 4324 bytes