Malicious PDF — malware analysis report

Static analysis result for SHA-256 7197d4f0e34e56bd…

MALICIOUS

PDF

43.3 KB Created: 2020-08-07 07:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7111325153503c6b88d7ce87e68e714c SHA-1: b9e1960e6bfd5429b15824485a273d00fdb804ae SHA-256: 7197d4f0e34e56bd755c4dd0f231d56a29ac07903c347591b672e2f864d5d081
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=causes+of+generalized+anxiety+disorder+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and a benign Shopify URL, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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=causes+of+generalized+anxiety+disorder+pdf
    • http://files.codamidwest.org/uploads/1/3/0/8/130814101/xafisuz.pdf
    • http://files.daraconley.com/uploads/1/3/1/0/131070792/7073104.pdf
    • http://files.thesquirrelloversclub.com/uploads/1/3/1/3/131379213/debitisenax.pdf
    • http://files.nicoleedwardsauthor.com/uploads/1/3/2/6/132680822/3230355.pdf
    • http://files.friendsoftimbercrest.org/uploads/1/3/1/4/131437017/rofixosenoso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/90358533970.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/dexabadazotisevupixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sedafasejizal.pdf
    • https://cdn.shopify.com/s/files/1/0434/8048/1954/files/67758544055.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/nd_board_of_pharmacy.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/govopoketaripuxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/minecraft_xray_pack.pdf
    • https://cdn.shopify.com/s/files/1/0441/1781/9544/files/44711526097.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3553/files/past_simple_present_perfect_exercises_3_eso.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/66938080398.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006acd.bin
d743f53fabe8f4357a3fddc8e89706fbc373a7343d224e30d5fe2bcf0df37dd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACD 5336 bytes
font_01_sfnt_off00007d15.bin
e05476fa7beca16a8c2dfceafab9e3dbe75f9d0798eddd0ff380d001ddc3cfab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D15 10160 bytes

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