Malicious PDF — malware analysis report

Static analysis result for SHA-256 6458d741eb372368…

MALICIOUS

PDF

54.2 KB Created: 2020-08-18 14:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfc167ce2179171a1904e2a39c8806f0 SHA-1: e63d263bd6443b16f1c0f34efc5eccbe08bd4f3d SHA-256: 6458d741eb37236879f8eb5d0286ca924ba750302bb168ef4c8e72553c792d29
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to external PDF files, creating a link farm. One prominent link, 'https://ttraff.ru/pify?keyword=captain+america+2014+dual+audio', is identified as a malicious redirector. The document's content, including the mention of 'Captain America 2014 dual audio', appears to be a lure to disguise the malicious nature of the embedded links. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=captain+america+2014+dual+audio
    • http://files.awwca.com/uploads/1/3/1/3/131380616/xumowafedoni.pdf
    • http://vibok.alamocitygrafix.com/uploads/1/3/1/6/131636789/faxilagofexexup-dilijez-sixododif.pdf
    • http://majaro.foothillsphotogroup.com/uploads/1/3/0/8/130814328/7803910.pdf
    • http://files.wicomicoriver.org/uploads/1/3/0/7/130739470/pabefemimesas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/79881953830.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/84766140696.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/lidakapolitudedenujakosag.pdf
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/all_company_logos_with_names.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/6223794557.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/auction_bidders_guide_nsw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/tidunat.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/83384281681.pdf
    • https://cdn.shopify.com/s/files/1/0432/4062/0200/files/9988957693.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dd8.bin
f95568c2697b4851d02fa8d9535198a83aeb422d450ba3218f04de699d95f6f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD8 5360 bytes
font_01_sfnt_off00008ffb.bin
40e09d4d4a47024a7a4a35d5630f3c7c0ae3be567be73b149aeb121196769f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFB 14352 bytes
font_02_sfnt_off0000bd86.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD86 4324 bytes

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