Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d961e802f786d8…

MALICIOUS

PDF

38.0 KB Created: 2020-08-12 01:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6e83d0784d5b8564210b6a88ff9a36 SHA-1: 2bfc9a9be652e9b4e99a0670a6f12f4df57ffa79 SHA-256: 98d961e802f786d89ff1c0b71204db242737224530924348ab769f87a9a0605f
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one prominently leading to a known malicious redirector. The document body, though partially corrupted, includes text suggesting a lure related to a 'capillary tube length conversion chart'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. The primary malicious IOC is the redirector URL, which likely serves as a gateway to 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.cc/pify?keyword=supco+capillary+tube+length+conversion+chart+pdf
    • http://files.devneurolab.com/uploads/1/3/2/6/132695302/9458784.pdf
    • http://files.mountainmaterials.net/uploads/1/3/2/6/132681194/4698529.pdf
    • http://files.rudisrescue.com/uploads/1/3/1/8/131856160/jikaba.pdf
    • http://files.citasonlinepasaporte.com/uploads/1/3/1/4/131407465/xijivemaripopoperu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2856/files/pikeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/beliwivupugejupaxumobonam.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/30408594306.pdf
    • https://cdn.shopify.com/s/files/1/0429/6559/8364/files/wirusupiwemenavavekifodem.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/53750599829.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6471/files/classification_clustering_and_data_mining_applications.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/lirinujemujulaxelumasuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/sosozojivag.pdf
    • https://cdn.shopify.com/s/files/1/0436/7679/5030/files/articulo_placa_bacteriana.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/sizijeribuwebegomosem.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/indila_tourner_dans_le_vide_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/tidiwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/26818916658.pdf
    • https://cdn.shopify.com/s/files/1/0446/9299/6252/files/list_of_eponymously_named_medical_signs.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/creative_thinking_notes.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/
    • https://cdn.shopify.com/s/files/1/0446/9299/6252/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053f6.bin
84a933bd3a4147e033e2759c2da9a8d5d4ee68a9f3a936f20f2beab519af01a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F6 5820 bytes
font_01_sfnt_off000067bc.bin
75c6878dd3662d53bcf51f093ecd89c1327f1a0c6d3cb1dd08714b30f7180a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BC 10156 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.