Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57bbbeec43f764c…

MALICIOUS

PDF

49.8 KB Created: 2020-08-07 13:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a9d530276d0a3eb13bdc9e444add463 SHA-1: 9eb1a59873eb918a81018f095917c22309a0d9fa SHA-256: e57bbbeec43f764c1fcc3043b0654730ac8aff11aa1b3080f79c91fabe8e20a3
152 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs. The primary malicious indicator is a link to a redirector at 'ttraff.ru', which is known to host malicious content. The document also contains a large number of links pointing to Shopify domains, suggesting an attempt to create a link farm for SEO manipulation. 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.ru/pify?keyword=cedaw+notes+pdf
    • http://files.micropowernanomag.com/uploads/1/3/1/4/131454034/fenufobi-boxemonipitirix-losojiloma.pdf
    • http://files.confectionatelyyours.org/uploads/1/3/0/9/130969505/mapifovekakome.pdf
    • http://files.distantfin.net/uploads/1/3/0/8/130874510/walepogoda.pdf
    • http://files.mindfulvisionaries.com/uploads/1/3/2/7/132740892/sopovofafikuxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/tulobako.pdf
    • https://cdn.shopify.com/s/files/1/0428/4756/8039/files/56127960505.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/321946332.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/leditofim.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/75658586024.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1924/files/77852561860.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/kigoduzifogedowopegal.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/16411454109.pdf
    • https://cdn.shopify.com/s/files/1/0452/4238/4545/files/12th_botany_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8905/2316/files/fanowopi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3668/7008/files/fibonacci_sequence_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/counterfeit_gods_tim_keller_free.pdf
    • https://cdn.shopify.com/s/files/1/0450/6569/9478/files/d_d_5e_mystic.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_off00008761.bin
c3dd5dbaedea73a7e5a02d70dbdbb44542af717d56e0c2195f754bf1d64f83d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8761 4904 bytes
font_01_sfnt_off00009839.bin
59615cb0abd09365e29ebe751c7a79bd44d88817af5a8b727eadba34274b7b89
pdf-font-stream PDF embedded font (sfnt) at offset 0x9839 10076 bytes