Malicious PDF — malware analysis report

Static analysis result for SHA-256 64802cc8958124fc…

MALICIOUS

PDF

38.1 KB Created: 2020-08-11 14:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 950d4eea4d6449b5b236643a9dd0c9c6 SHA-1: 77b88cd85e65f0959e34dbee25b42319b2500f5e SHA-256: 64802cc8958124fca889fbbfc827281286ffa6e2cf7fa34c34fb16f0c0298781
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent URL, 'https://ttraff.ru/pify?keyword=libro+administracion+de+recursos+humanos+arias+galicia+pdf', is flagged as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent.

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=libro+administracion+de+recursos+humanos+arias+galicia+pdf
    • http://tugajepid.tomorrowlandtshirtauthority.com/uploads/1/3/1/6/131606739/mogatilidiposis-pixorofazod.pdf
    • http://files.kanzcoffeecompany.com/uploads/1/3/1/6/131606175/kazotu.pdf
    • http://files.bethuneandson.com/uploads/1/3/1/3/131397996/belinurekoj.pdf
    • http://files.danishclubnanaimo.com/uploads/1/3/1/3/131397987/jofakop-lemexibixokeku-dukobupa-vozikivogusupe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/93787299696.pdf
    • https://cdn.shopify.com/s/files/1/0430/7147/1767/files/93567837857.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/91490678741.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/98632696215.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/fiwokegazizosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/45961661654.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/43322160947.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/74518302666.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/rexuxitavivawopim.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/libris_mortis_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0431/0594/3701/files/vayne_s7_build.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_off00005124.bin
9f635b16bda3a92970ad8d39db2a2127538a5b90dd3c52b24198551a84d17949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5124 5652 bytes
font_01_sfnt_off00006423.bin
d1654e0fd2e883405d16b49c9cee9aa734e97c51bb1c009578d79f449bc5871c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6423 11284 bytes

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