Malicious PDF — malware analysis report

Static analysis result for SHA-256 168bcd49219b9068…

MALICIOUS

PDF

47.7 KB Created: 2020-08-09 14:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fca207a7d20b3d6f8fe543b8c081c1ba SHA-1: df12e6e46bffe0413969d1716ae3d8c1de06e52d SHA-256: 168bcd49219b90686b1c6ba5b2ccdca9f4dc05c3b766db3bee0aae0b6139c515
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=bsnl+249+plan+pdf', suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or distributing further malicious content.

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=bsnl+249+plan+pdf
    • http://files.msdreyer4discovery.com/uploads/1/3/2/6/132695339/todisurufavafu.pdf
    • http://files.dedhamfps.com/uploads/1/3/1/4/131437932/bulurokij-sawulos-pinerepiku-semimuwulef.pdf
    • http://files.hamiltongrace.org/uploads/1/3/2/8/132814241/deratewaripizi.pdf
    • http://rivaw.jleatherwoodtrading.com/uploads/1/3/0/8/130814328/wagaxifixetepip_wofajubibigekog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/dadoka.pdf
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/9674976849.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lenibokufilitixesokan.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/wibubuka.pdf
    • https://cdn.shopify.com/s/files/1/0430/9847/2605/files/26350511120.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/banking_act_1959.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.pdf
    • https://cdn.shopify.com/s/files/1/0444/1328/8614/files/total_thyroidectomy_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/zefafope.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000612e.bin
8ee6ca61627c6c6f4f50b921b5dead36dff82b2a4fb3638348caaa808a1e0737		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612E 5364 bytes
font_01_sfnt_off0000738b.bin
26bdf7d66959a9d7d754e8a5ea3fa63a4f53f4398698b77ec042b88b7f442322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738B 12024 bytes
font_02_sfnt_off00009b28.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B28 16164 bytes

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