Malicious PDF — malware analysis report

Static analysis result for SHA-256 91017e6794e37acc…

MALICIOUS

PDF

39.9 KB Created: 2020-08-13 16:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf37a0f1a16ba5e18a554b378fa5eded SHA-1: a0cfce946221deaa49ea0d7bf999a1ded216e9ce SHA-256: 91017e6794e37acc9baccc7c7396cd2b6e227d96b0eff05ab000efcf04b62f83
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by the presence of a large number of embedded external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the text 'Citizenship bill pdf' and the malicious URL https://ttraff.cc/wb?keyword=citizenship%20bill%20pdf. This indicates a likely phishing or malware distribution attempt by luring users to click on the provided link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=citizenship%20bill%20pdf
    • http://files.tylermoorefilms.com/uploads/1/3/1/4/131406173/2a4b03996.pdf
    • http://files.hopewellcompanies.com/uploads/1/3/1/0/131070485/be771c4b7f395b1.pdf
    • http://files.littleladyo.com/uploads/1/3/0/9/130969004/furopigolijur.pdf
    • http://files.rebeccaguay.com/uploads/1/3/0/8/130874233/vukugonemedokuselula.pdf
    • http://tazigit.kcmcommunications.net/uploads/1/3/1/4/131453823/8979723.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/ninanoredowanaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/ansys_fluent_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4301/3287/files/85706085281.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/topenujetumusizetamasazis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0471/5427/files/74422869534.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/pogepawesoteba.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/puzebefesepakebo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5826/4229/files/discord_different_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/xadewatulefikutabusad.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/problemas_de_mcm_y_mcd.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_off000060af.bin
95e8031ddbb1b96cc25b715c43301ef9bac8286b91ad4fc5342fdb65859b7c35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 4916 bytes
font_01_sfnt_off00007162.bin
f7f02043c64cec144aaf07fa846cb0351943f96b0833b5b2db583d88194ea339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7162 9936 bytes

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