Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b327b61e6bb6b41…

MALICIOUS

PDF

39.0 KB Created: 2020-08-31 02:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18fc65c0697197586ad58630f5c77b70 SHA-1: a644fd8d70a665d257a37a87562bdb720dde6ca0 SHA-256: 3b327b61e6bb6b410973c3fbf5530029a0a5ea42eae291597eab533959340a99
152 Risk Score

Malware Insights

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

The PDF file contains a prominent link that, when clicked, redirects to a malicious URL. The document body, though heavily obfuscated, contains text that appears to be a lure for a movie download, aligning with the malicious redirector link. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a redirector and part of a link farm.

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.cc/wix?keyword=dil+dhadakne+do+full+movie+download
    • https://cdn.shopify.com/s/files/1/0431/8189/9936/files/86049217719.pdf
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/79909620093.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/ranifonuposugizadobev.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/22320190996.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/48824543858.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/40535667295.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/pomamowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/niv_journaling_bible.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/kajebojodililazeluno.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/68416039049.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9605/files/83373547834.pdf
    • https://cdn.shopify.com/s/files/1/0434/2372/7783/files/woxavikesurulaluvofozetu.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_off00005b86.bin
19ccb0422aa6190bc1b0d718d7761c5f85752c7e67a923642026a85704cacd53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B86 5088 bytes
font_01_sfnt_off00006cc2.bin
182b4bfab38b617674bd2af6f4ee2184f3c565960cfdbdd1f64c7c1177f9375f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC2 10128 bytes

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