Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bca6ecb0c17730a…

MALICIOUS

PDF

61.2 KB Created: 2020-08-17 07:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee6d4d55fed8760b7a83f7971ea92d62 SHA-1: c0be12bb1d1e796a49f8e7fe1924f6e9a1cf71a7 SHA-256: 7bca6ecb0c17730a98acc2cd60623123cd0ce164a6d62bc481b9393b99a78375
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to other PDF files, many hosted on Shopify. One of the primary links directs to a known malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, likely designed to distribute malware or phish users. The ML classifier strongly supports the malicious nature of this PDF.

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=berserk+opening+2016
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.pdf
    • http://lizisaj.adriennebrewington.com/uploads/1/3/2/7/132712336/jozenez.pdf
    • http://files.sambaedmonton.ca/uploads/1/3/1/4/131408465/nejokisinemex_jigot_totanuraresetef.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/406745714.pdf
    • https://cdn.shopify.com/s/files/1/0434/0642/6266/files/marlin_336_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/5010/4982/files/da_form_1687.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/xonibekaga.pdf
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/gezixazu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1088/files/83184508191.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/43765806942.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/wofobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/86138152514.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/midatafivelukesolojowotod.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_off00005fdb.bin
24497a9fff878ae35ce9495520baac45ac5704388018ff02fbf53279bc270af7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDB 25996 bytes
font_01_sfnt_off0000b1bc.bin
a437f7fc25277f1a820ac1b52839034eaa9e67e881312381ba26063172551e4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BC 5336 bytes
font_02_sfnt_off0000c40f.bin
6d6853ec3a88432682fc5516e5da97264db1242cf3907ae4d2f91b4d2c71af16
pdf-font-stream PDF embedded font (sfnt) at offset 0xC40F 10112 bytes