Malicious PDF — malware analysis report

Static analysis result for SHA-256 3862f290ac5fa530…

MALICIOUS

PDF

61.4 KB Created: 2020-08-19 18:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1d21c4c23a6116ecaa59baa2211a66a SHA-1: 936808f0158aeb087f72722ffb2afaf2977191e6 SHA-256: 3862f290ac5fa530a299db77680a1f17a3f2a7f19dc24c7c8c5f7a1453b82fa4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs hosted on Shopify. The document body, though partially corrupted, contains the same redirector URL. This suggests the primary purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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=difference+between+christianity+and+catholicism+yahoo+answers
    • http://jafatuse.wcorbin.net/uploads/1/3/2/7/132712354/fatanep.pdf
    • http://files.delondaadams.net/uploads/1/3/1/8/131871633/5438490.pdf
    • http://files.learnesolglasgow.com/uploads/1/3/0/9/130969059/tegugekixemobixowapa.pdf
    • http://files.hawkecreations.online/uploads/1/3/2/6/132682929/fukezusapuv_kudex.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/nifukulas.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/wetotaxawoditifuvukag.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/sewiwanumifi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/xaseluriro.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/pivesobuxelebeteru.pdf
    • https://cdn.shopify.com/s/files/1/0448/9363/4727/files/grainger_catalog_406.pdf
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/kizam.pdf
    • https://cdn.shopify.com/s/files/1/0437/8922/2037/files/87720909195.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/calligraphy_fonts_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/2830314852.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/tujinumudexos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/powezovitefoken.pdf
    • https://cdn.shopify.com/s/files/1/0433/4734/5573/files/23505763712.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_off00008a02.bin
7e3b821dca4397537414ae179d975948c16318ac738f6d6aae08b6de60e4a316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A02 5596 bytes
font_01_sfnt_off00009ced.bin
3919818e9fb5461b1ce4ecfd210c9f96e47fb753791c00baf5ac95dd78494e1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CED 17308 bytes
font_02_sfnt_off0000d233.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD233 16204 bytes

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