Malicious PDF — malware analysis report

Static analysis result for SHA-256 775acb839f8f7ed9…

MALICIOUS

PDF

59.6 KB Created: 2020-08-05 11:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fd7aff72c310d189956e0c3d08086c4 SHA-1: d3d0f20dd3b2ff0797c81c93f0abb085f2a096d5 SHA-256: 775acb839f8f7ed9acb9b658cd7357bfe84634afc7d23ffaf9b439077161cd1b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=midas+and+the+golden+touch+pdf'. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. While no scripts were extracted, the presence of embedded URLs and the redirector link strongly suggest an attempt to direct users to malicious content, 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.cc/pify?keyword=midas+and+the+golden+touch+pdf
    • http://files.sensualtigerholisticarts.com/uploads/1/3/1/3/131380054/gexeg.pdf
    • http://files.mendocinocommunitylibrary.org/uploads/1/3/0/9/130969775/ad7ac5e1a19.pdf
    • http://files.themassageplacesp.com/uploads/1/3/0/7/130775528/6784262.pdf
    • http://files.tasteandseebakery.org/uploads/1/3/1/4/131438079/0ee4594994754.pdf
    • http://files.siphc.net/uploads/1/3/1/3/131380687/67493514202741.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3087/2215/files/donikogofoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/44816342115.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/xotedokim.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/64600657808.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29318048561.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9736/files/xejevowivop.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/26346484330.pdf
    • https://cdn.shopify.com/s/files/1/0430/4499/5221/files/bodiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/11815467638.pdf
    • https://cdn.shopify.com/s/files/1/0432/2725/0850/files/maxibel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/xefunuwe.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_off00008f68.bin
ef2d0e687416eb3898fe8168dafbe697e9df8a040bc867d8dbad6c9a4d366c1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F68 5324 bytes
font_01_sfnt_off0000a193.bin
caf1401e2955c2f334f6571fea630b4863fa7294c5ae06628710b0f2955068fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA193 12632 bytes
font_02_sfnt_off0000cbc4.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC4 16204 bytes

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