Malicious PDF — malware analysis report

Static analysis result for SHA-256 389348d0a1d26115…

MALICIOUS

PDF

41.5 KB Created: 2020-08-05 04:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd078126a2bb055a9539ba1ccc6fd9b4 SHA-1: ac98bfbfcda5899a677e711b8596df2f6d10977a SHA-256: 389348d0a1d261158aa0bd27e90d2defdd7662a058dc77f24a633a1027aa04bf
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one leading to ttraff.com, suggest a redirection chain likely leading to a malicious payload or phishing site. The presence of numerous links, many hosted on Shopify, indicates an attempt to leverage SEO or create a broad distribution network for potentially 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=cognitive+interview+techniques+pdf
    • http://files.catholicplacemats.com.au/uploads/1/3/1/0/131070972/2ebfc3dcd5d2ae4.pdf
    • http://files.sewonandsoforthtexas.com/uploads/1/3/2/3/132302824/rawifuwinajajo.pdf
    • http://files.pennjournalconlaw.com/uploads/1/3/2/6/132682694/bawibixijuzawo.pdf
    • http://kuvoxofor.anngenuity.com/uploads/1/3/0/7/130775934/gugutupiforad.pdf
    • http://files.eddiening.com/uploads/1/3/0/7/130738792/1882650.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/67617203116.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/69033869428.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/29715250176.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/pokosidoxeromolube.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/52584419928.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/analytical_thinking_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/downtown_los_angeles_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/7860/6229/files/bazew.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/donon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumuwajufutoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1830/5179/files/12636015406.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/45878325464.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/vunarekoted.pdf
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/nitro_professional_8_serial.pdf
    • https://cdn.shopify.com/s/files/1/0433/8614/2876/files/gomefubelegokubejeloborik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006581.bin
5a5f71359f99220420025109ec35dcc586cdc92ddb9d43ccc01641f0ad908757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6581 5360 bytes
font_01_sfnt_off000077cd.bin
d0149c68434f03237cbab5ad61181df99bba2da4a4afd349008a66f096dac3b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CD 9676 bytes

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