Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a585126982d5c9…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 08:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3c1b99f56f69f1c74711f7523684713 SHA-1: 61b715835ca3de2725c047fc9cb5ddd639881fb8 SHA-256: 11a585126982d5c92ffb2526795d06d3682d0bada30c8f71512271c525c23ddf
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a movie title, likely intended to trick users into clicking the malicious link. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to increase visibility.

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.com/wix?keyword=bewars+full+movie+telugu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/7603ae_1cf7b8b725f54a808b36706aba201775.pdf
    • https://static.usrfiles.com/ugd/bf0735_d6a6d4906e014f2b82784a0cef78a927.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_b71f0d37a3f14cbf8d785392912b88e4.pdf
    • https://static.usrfiles.com/ugd/6924eb_989b5919ac13421492b03458a0a2aab5.pdf
    • https://static.usrfiles.com/ugd/b8c837_72a77c6f42df4815a362f73cc5c5168a.pdf
    • https://static.usrfiles.com/ugd/b8c837_79e5621b3b93465c933d78aa27bd31cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d7c4b5b4d9046ca9ef19843cf3001c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c4fb647dd054692b25bf14dd7892cc3.pdf
    • https://static.usrfiles.com/ugd/4f270c_38da0a2472924770bacb87b676c0f293.pdf
    • https://static.usrfiles.com/ugd/2813e2_50c1a012baa94950990c519cc5ea9fe6.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/74671770847.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/fijaluwekebiko.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/ligenezomif.pdf
    • https://cdn.shopify.com/s/files/1/0447/0882/3193/files/wutixamajenuwowanaposud.pdf
    • https://cdn.shopify.com/s/files/1/0429/6844/9180/files/43187472369.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/pagemaker_to_converter.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/39281388839.pdf
    • https://cdn.shopify.com/s/files/1/0463/3044/5981/files/wemominenowekuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2589/files/axelos_itil_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/89028569560.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_off0000669b.bin
ef34d2d004a73667c9252efcd51fc32c6beff56e3dd9d9bb477ab4a406ea09e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 5288 bytes
font_01_sfnt_off000078a3.bin
62466fcafaa8ab42875045ccd258c8ef55c898e87caaab26d809489f9a17213b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 10272 bytes

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