Malicious PDF — malware analysis report

Static analysis result for SHA-256 34467d71de173cc4…

MALICIOUS

PDF

70.6 KB Created: 2020-08-09 15:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da5347f2ac6530685141668202b6496a SHA-1: 757c48fa68311fc59514e89da2ecd9bb4055af53 SHA-256: 34467d71de173cc4df02b139cea341f0c034452c4d33c912928c836598a82033
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for 'definition of bullying pdf'. This indicates a phishing or social engineering attempt to direct users to malicious infrastructure. The PDF also hosts a large number of external PDF links, many of which are benign, but the primary malicious link is the most concerning.

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=definition+of+bullying+pdf
    • http://files.sixdegreeswriter.com/uploads/1/3/1/6/131636654/jilejilavepesom.pdf
    • http://doroke.omsbands.com/uploads/1/3/1/3/131398455/281f7bb8b44.pdf
    • http://files.aftonhistoricalsociety.org/uploads/1/3/2/6/132682684/8a206eaf13c935.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3086/3259/files/26897715402.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/tujegesati.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6991/files/saxixetukakerodefok.pdf
    • https://cdn.shopify.com/s/files/1/0444/8436/2407/files/57678349650.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/surisoselivuzodoxiruri.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/riesgo_de_trabajo_imss.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/datigapolatuxobesirenabej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5387/files/xoxokukono.pdf
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/badimivu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/incarceration_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51686393220.pdf
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/67005342211.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/towonomanijalesirinedune.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000d6ab.bin
5f242b53a1010ab84e6d25273bd9c7da4cb983ec411af6cebf13b2525c008b43		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD6AB 30308 bytes
font_00_sfnt_off00008f8f.bin
c22b9bdecd11cef756b63d339cdfa8445cce4c5fddef78aa50e27e77c4bd0d83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8F 5216 bytes
font_01_sfnt_off0000a1d9.bin
5d2c3b6c870b46d2a4969360aefbf3c3b59c8f5efb748f9b2190f03aec733e35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D9 4964 bytes
font_02_sfnt_off0000b2e4.bin
c3cd778c22f7850c2e60f4d9b728b0cd5fde953cf2364221fe50eb570410e02e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E4 10432 bytes

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