Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d33f420e27794ad…

MALICIOUS

PDF

50.3 KB Created: 2020-08-21 16:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7191f6500f7b5915512b445644f368b0 SHA-1: a32cf6c07a1d14a0d53377f68efb546c6d9e181e SHA-256: 6d33f420e27794ad468b94044bc1bf434fcdf13a772149a7a84c078fd28c4d41
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to "First world war in telugu pdf" to entice users to click on the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=first+world+war+in+telugu+pdf
    • http://kijiji.nigelbeebe.com/uploads/1/3/2/6/132681790/10d33db27.pdf
    • http://files.sapientconsultants.in/uploads/1/3/1/4/131409037/xivisowimuzozu-kibup-zoxalekaj-perinoxabolef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/dupapisaripureta.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/pectoral_region_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0438/1687/8242/files/zejobibometipasetaxujom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7750/9020/files/jeliwobu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/space_launch_system.pdf
    • https://cdn.shopify.com/s/files/1/0435/6322/1155/files/deliberao_arsesp_732.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7570/files/wolezetinezisajizafurop.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/vuginazevuvubozes.pdf
    • https://cdn.shopify.com/s/files/1/0432/6345/9486/files/wekazigebabesikexawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/kuzokirofitawakarafiw.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_off000087b2.bin
e8fe6c554b7030aae6cf81a7aabd7aada596c66fd82634d8bdde5666f5a93b04
pdf-font-stream PDF embedded font (sfnt) at offset 0x87B2 5256 bytes
font_01_sfnt_off000099bc.bin
a2f6e7316aa7592c6268bfbf9f2ddaf1f1f355ac25c2dc2ead1a1ba9231be130
pdf-font-stream PDF embedded font (sfnt) at offset 0x99BC 10416 bytes