Malicious PDF — malware analysis report

Static analysis result for SHA-256 790d0f20f8b87133…

MALICIOUS

PDF

46.0 KB Created: 2020-08-18 16:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89fb8a569b1a9d50a9083d2a0c9040e6 SHA-1: 91f36e2948cda8677cf4c600a710ed8dd618a51b SHA-256: 790d0f20f8b871334870c1030026b3d682a9295490834078f1992ddaa4608ab1
154 Risk Score

Malware Insights

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

The PDF document contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=dubai+tour+guide+license+course+fees', is identified as a malicious redirector. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the malicious redirector strongly indicate an attempt to lead the user to a harmful destination, likely for phishing or malware distribution.

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=dubai+tour+guide+license+course+fees
    • http://nilaj.makerspaceretreat.com/uploads/1/3/0/7/130775166/7e1e9a3.pdf
    • http://files.antoinescookieshop.com/uploads/1/3/1/6/131636726/b36d3e17ff72b9b.pdf
    • http://luzimon.chipgeorgia.com/uploads/1/3/1/6/131606346/30cfabe3.pdf
    • http://files.csmmttaiwin.com/uploads/1/3/0/8/130813526/wiwaxizudamasor_tafep_kigumoju.pdf
    • http://files.pdxprays.com/uploads/1/3/1/3/131383018/wikixawasagi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7832/8224/files/mekuratidusejuzuxawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/kipivovozagegedu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9190/9025/files/daytona_beach_craigslist_org.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/foo_pets_login.pdf
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/ruparirinexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/jakukasapuzaziwuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/neoliberalismo_histria_e_implicaes_david_harvey.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_off000076a1.bin
79327d4249d8763bc62936910ce59db04389b562c5ea17309eeb0a92ae7c0848
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A1 5328 bytes
font_01_sfnt_off000088c9.bin
7e28621419404cc5c053271da9e7d3c333d5bddc21cb9e9412a2bf4f14989a6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x88C9 9948 bytes