Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e1cd7a8b466901…

MALICIOUS

PDF

55.2 KB Created: 2020-08-10 11:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c6ec3f36a63a83da461fba91e3fd415 SHA-1: 274949601bf17909aa76e6cdf7d0525611d9b461 SHA-256: 07e1cd7a8b466901239419c0f6609f14cc8783122386175feab8b210393eb57a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=noughts+and+crosses+prologue+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an intent to lure users to 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=noughts+and+crosses+prologue+pdf
    • http://files.marydanroth.com/uploads/1/3/2/6/132681436/0be622fa.pdf
    • http://puseniki.superiortherapyconnections.com/uploads/1/3/1/6/131637881/tetilukarugamomodaku.pdf
    • http://files.partscare.aero/uploads/1/3/0/9/130969498/zizig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/22135142304.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/31089183544.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/punjabi_alphabet_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/pamajiledapiboruborad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/salivebosobadujexawatived.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/k_ril_tsutsaroth_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/nejerevekikekozatewisikob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/apostila_de_administrao_estratgica_em.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/bivijosebowoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/pilanit.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8723/files/anaphylaxis_action_plan_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/39089268739.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/vigupovalamoweluvemoxixa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f39.bin
b0f9f045fe17654f4e2ab6b6b74af28279927001cd08343a5f2d64b8f2bab52c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F39 5388 bytes
font_01_sfnt_off0000a188.bin
251b6496e54f90892180c583d7aa6448631554a763e030192d17ef6e215c35b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA188 1600 bytes
font_02_sfnt_off0000a9a2.bin
9e50d5f0df7606492e05aac123c374dc0a29fef7818d79cf031f33cf1e042bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A2 11372 bytes

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