Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81234f974c74f71…

MALICIOUS

PDF

61.3 KB Created: 2020-08-05 23:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d15172474e98e41dba44d35376bd75c9 SHA-1: 6a4ac6de1749dbbbe84206f82f484c269c976b5e SHA-256: e81234f974c74f7150aa490f477b7cea80de53421cf3c9bde31284169136b452
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'karnataka budget' and the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/pify?keyword=karnataka+budget+2020+19+pdf+in+kannada
    • http://fadejala.aperfectmix.ca/uploads/1/3/1/4/131408024/lowamomum.pdf
    • http://files.karenjrohrlach.com/uploads/1/3/1/4/131409508/f870c.pdf
    • http://files.suenospublicationsllc.com/uploads/1/3/1/4/131453684/2436685f.pdf
    • http://files.pivotaldancecompany.com/uploads/1/3/2/7/132740606/jomememuxikep.pdf
    • http://fadejala.aperfectmix.ca/uploads/1/3/1/4/131408024/lowam
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/7_days_to_die_zombie_stripper.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/65209522269.pdf
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/american_gods_episode_3_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/sijelopuvivigazarexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/tapivisobatofutokexapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/sonazudeto.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8912/files/44561183967.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/tojoxike.pdf
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/53242585791.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/55953572239.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/bajilururip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000951b.bin
ecb3f6677bf35164dc300ccdfa7134c760f295a90837a243b23b125bc57d8a88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x951B 5656 bytes
font_01_sfnt_off0000a872.bin
5036faf2309b0fb422c518ff357340920a007cd505e99c77ecabec82ff16c3a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA872 12144 bytes
font_02_sfnt_off0000d0c5.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C5 16164 bytes

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