Malicious PDF — malware analysis report

Static analysis result for SHA-256 142b38d7ff355079…

MALICIOUS

PDF

53.4 KB Created: 2020-08-09 17:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbf8195a3ea37ec40fa9c194a7688520 SHA-1: 04a3df75dd9a9376254df7787edad48cd670c635 SHA-256: 142b38d7ff35507996fe857c07e3fa91cd5592812c4d2c96b5d2c432494c0075
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Iata code airlines pdf' and the malicious URL. The presence of many external PDF links suggests a link farm or redirection strategy to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

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.ru/pify?keyword=iata+code+airlines+pdf
    • http://gopenas.mesamindfulness.com/uploads/1/3/0/8/130874330/2aa6dc4a7f46.pdf
    • http://files.edenshepherds.com/uploads/1/3/0/8/130813448/toduv_gidureveki_vefujarupakik.pdf
    • http://files.erinsmithlac.com/uploads/1/3/1/6/131606123/mumadinowimapili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0447/9241/4369/files/original_king_james_bible_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/semiwudix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/waxexakenanapuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/nugikiwifupuxusow.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/32717239710.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/25479644141.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/rod_cutting_problem.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/tenawovavudatela.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7261/files/52579428557.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/pukakazukumep.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3493/files/19171517714.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079a8.bin
9d3a426a2c3d2f5697efe1e4a01f3cb39cd33cc2ec1ef6333493a26a6928a415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A8 4876 bytes
font_01_sfnt_off00008a32.bin
b7c396149514c1d01a6c48337437f540144369d5e987953cb23a778a5658783e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A32 15252 bytes
font_02_sfnt_off0000b965.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB965 4324 bytes

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