Malicious PDF — malware analysis report

Static analysis result for SHA-256 1184478986f87aa8…

MALICIOUS

PDF

37.7 KB Created: 2020-08-03 19:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1603880b1986043c1235f6be37becc SHA-1: 3739f9cd4a8bededc35298324e205014f37120d1 SHA-256: 1184478986f87aa827458998e8194467b9fd799801618eb739f3690a5563880b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=nrsv+with+apocrypha+pdf, which is flagged as a malicious redirector. The document's structure and content suggest an attempt to lure users to external sites, likely for further exploitation or phishing.

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=nrsv+with+apocrypha+pdf
    • http://files.chanwinnie.com/uploads/1/3/1/6/131606289/puwakuduzuzeza_bekudaz_nixirurofu.pdf
    • http://files.findapartyconsultant.com/uploads/1/3/0/7/130739571/zeragimituliwijoni.pdf
    • http://files.fbclakebenton.org/uploads/1/3/2/7/132740214/d6c1dbd7.pdf
    • http://files.cvatclub.org/uploads/1/3/0/9/130969984/muvubesipolod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/kiwagogiwapijolin.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/80158069981.pdf
    • https://cdn.shopify.com/s/files/1/0429/4498/7292/files/pokemon_red_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0489/files/wejafatubovewolusiza.pdf
    • https://cdn.shopify.com/s/files/1/0428/1958/4166/files/91097927732.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/98909245119.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6059/files/27797845164.pdf
    • https://cdn.shopify.com/s/files/1/0436/8593/7307/files/85974880718.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/xilekawagin.pdf
    • https://cdn.shopify.com/s/files/1/0440/0319/7078/files/ziduvod.pdf
    • https://cdn.shopify.com/s/files/1/0437/3273/0008/files/7726167660.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/77047246453.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005385.bin
cb73c9e9aea2b209b605beedf7212895a6598fbea262fdf3c46f86a31098a2fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5385 5432 bytes
font_01_sfnt_off0000661d.bin
032dcc615717c968b450ca05b9beb68b1247b58116de39c9d543766bf8e80ebb
pdf-font-stream PDF embedded font (sfnt) at offset 0x661D 10552 bytes