Malicious PDF — malware analysis report

Static analysis result for SHA-256 469785e18fb941bc…

MALICIOUS

PDF

50.4 KB Created: 2020-08-21 09:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea971aecac37304c1a9626471ce58102 SHA-1: 1d36b05d9eb85ce3a07938ee7c892faf617ccd53 SHA-256: 469785e18fb941bcf4b0487f509a5364c13733fad5726e8bbd1a54ce4109d520
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a reference to 'Fight Club' which is likely a lure. The PDF also hosts a large number of links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse. The primary malicious IOC is the redirector URL.

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=fight+club+imdb+parents+guide
    • http://gowane.pama.org/uploads/1/3/1/6/131606183/19ca3e017.pdf
    • http://files.tammybiggsgymnastics.org/uploads/1/3/0/7/130775475/522de.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/xukanepagebovixibat.pdf
    • https://cdn.shopify.com/s/files/1/0455/6003/7541/files/fhp_synchronous_motor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/gukedafemanisejapudid.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/xefetigusiku.pdf
    • https://cdn.shopify.com/s/files/1/0437/2516/0602/files/17719809254.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/enciclica_caritas_in_veritate_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/69537989334.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/46134552661.pdf
    • https://cdn.shopify.com/s/files/1/0429/3070/0455/files/malaria_parasitemia_grading.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/mexubumatuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/guriribukiwejaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/29985045633.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/rivanesu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/77569143832.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/seismic_data_processing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071c3.bin
f0182aecd560f15419c2690c5dc935b62de362aac0788978c5c278527f17042b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C3 5352 bytes
font_01_sfnt_off000083c4.bin
ebdf068f018a8421c42e43b57247fa27f61d4290d1310fdcbb2c45b0096832ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C4 13464 bytes
font_02_sfnt_off0000aea8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA8 4324 bytes

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