Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d6943b4f75fb64…

MALICIOUS

PDF

43.9 KB Created: 2020-09-02 00:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9527aee3dd670852d6a62b6ca59f2027 SHA-1: 8b14d03ab490f6080a44ee2d2f0c896c51a02b53 SHA-256: 28d6943b4f75fb64164e310a6cfe27297dcf72ac64c41e46ff77890c52243c3c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a tactic to disguise malicious links within a larger set of seemingly benign content, likely to evade detection or to appear as a legitimate resource. The primary malicious URL is https://ttraff.cc/wix?keyword=gina+guidelines+for+bronchial+asthma+2017, which is presented as a link to a document about asthma guidelines.

Heuristics 3

  • 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.
  • 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/wix?keyword=gina+guidelines+for+bronchial+asthma+2017
    • https://ginasthma.org/pock
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/15993182509.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/sedajogufageditaxujib.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/kh_rechain_of_memories_iso_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/8320/0680/files/stochastic_oscillator.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/aptitude_questions_and_answers_with_explanation_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/37532019444.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/acca_f7_financial_reporting_past_papers.pdf
    • https://static.usrfiles.com/ugd/b88e3d_1c8820fb9dfb4122b129928c21d1b2a0.pdf
    • https://static.usrfiles.com/ugd/8c0e65_f4b725b6862b4c10903bd8fe5006185f.pdf
    • https://static.usrfiles.com/ugd/b8c837_40f97e0fbb804426817f6eb5bfaa3cf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4865/files/c_getline_from_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/fusionner_plusieur_fichier.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/voteposevejejojobelik.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_off00006ba7.bin
7cfa3d7813b78d78eda1b3a443a6dd45d436144928795c118551b3c154aa0ea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 6012 bytes
font_01_sfnt_off00008004.bin
a0c1aeb46b1d92623e4fee3cca1d85f5e843d3ad0d9ab700784a2fb1756a5488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 10368 bytes

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