Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ceacb1447b9e34…

MALICIOUS

PDF

32.9 KB Created: 2020-09-07 08:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9b3244e70c8d1a91d72797edf51bb45 SHA-1: 98205c84bd71ff0c40338e790799b049d63f71d5 SHA-256: 89ceacb1447b9e34b879c810788b77f63ebebc08d7e63a43876e4a181b5916db
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a movie download, further supporting the malicious intent. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to benign-looking PDFs, likely part of a link farm to improve SEO for the malicious redirector.

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.club/wix?keyword=rupinder+gandhi+2+movie++hd+1080p
    • https://static.usrfiles.com/ugd/c0518c_14e139de665f483f9292984c9583b8c4.pdf
    • https://static.usrfiles.com/ugd/83b1b3_06415bb01a764099bba5d475ac987bdd.pdf
    • https://static.usrfiles.com/ugd/1f5cef_a255e8668e904583a5709f7ae38d3e2e.pdf
    • https://static.usrfiles.com/ugd/804ff6_6f1ee9596ba94a9bae55a6e451cdf7d8.pdf
    • https://static.usrfiles.com/ugd/a838c0_31b314fbb3554735ab98d77bed778df5.pdf
    • https://static.usrfiles.com/ugd/98d639_8770a4bd3ba742d1aeb7a017ed1f188c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetuvoveluganimuwejipas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1277/files/rexopero.pdf
    • https://cdn.shopify.com/s/files/1/0437/4446/0951/files/garowebafajix.pdf
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/40131391878.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80789229335.pdf
    • https://cdn.shopify.com/s/files/1/0466/4190/5829/files/dadokidudeworidoguze.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000424f.bin
8a4b4239641653b8af23e7947def87571d23123a6b78ecc9fbf026bc67056704
pdf-font-stream PDF embedded font (sfnt) at offset 0x424F 5752 bytes
font_01_sfnt_off000055c6.bin
3c4816aa5a6e849f9f6bad422df5d3a1ce7868c955e2d48c92340a856c726770
pdf-font-stream PDF embedded font (sfnt) at offset 0x55C6 9648 bytes