Malicious PDF — malware analysis report

Static analysis result for SHA-256 e498453930211606…

MALICIOUS

PDF

51.4 KB Created: 2020-08-30 09:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0df1c003d31db4262ea84997c8eb8fc1 SHA-1: 3f2b4495f9b079e3849452b10c6f3362a7dda7de SHA-256: e498453930211606f47304a05e37bcb3fa8abfdb480d070a07a3574864a29b2e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. The document also contains a large number of SEO-linked PDFs, many hosted on Shopify. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be a lure for a 'screen mirror app' that redirects to the malicious URL.

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=screen+mirror+app
    • https://cdn.shopify.com/s/files/1/0452/4494/0445/files/82026953711.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/bach_bwv_846_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/lonumirisul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/sulupolepojenuliravanig.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/bosch_washing_machine_repair_manual.pdf
    • https://static.usrfiles.com/ugd/ac51ce_dd03a07bf5e645079527f6167ded681f.pdf
    • https://static.usrfiles.com/ugd/d2751c_dd891bc64c84415a98cad2e8d8e30a87.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6e58425420a424886fa6e7d8e2336de.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/84358318648.pdf
    • https://cdn.shopify.com/s/files/1/0431/8029/4298/files/povafimakaxav.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/78426495974.pdf
    • https://cdn.shopify.com/s/files/1/0433/8329/2060/files/jezemetedazekituje.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/santa_monica_dream_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/24181890199.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4366/files/gerutuvibejodukit.pdf
    • https://cdn.shopify.com/s/files/1/0461/7034/1528/files/welopumebojejomorab.pdf
    • https://cdn.shopify.com/s/files/1/0437/1742/7352/files/exercice_sur_barycentre.pdf
    • https://cdn.shopify.com/s/files/1/0463/0786/8834/files/58815746786.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f7.bin
93c416c27aa490f8554e33af6116e21ce155c01827a3c41e862478f3fdda0dcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F7 4680 bytes
font_01_sfnt_off0000799d.bin
bcf7710fbbb7df6f7065350d85db164a03c1e2587fcc901d71585188a0fcaf9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799D 10484 bytes
font_02_sfnt_off00009d7f.bin
653593fd1d80a85ed6f0165f1aba34eea3860f78c4af0c5284fe4824caf7b9a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7F 16120 bytes
font_03_sfnt_off0000b26b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB26B 4324 bytes

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