Malicious PDF — malware analysis report

Static analysis result for SHA-256 798872c34b0a0003…

MALICIOUS

PDF

53.4 KB Created: 2020-08-08 09:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d3bd02f47282687efde9440b37dc9d8 SHA-1: 83141573e6878cc4a14384cb442286fc21486f26 SHA-256: 798872c34b0a000345d55644af4eaefdae020eb8c0c3394a2dee34bf968724dd
150 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 'https://ttraff.cc/pify?keyword=bsp+thread+dimensions+table+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. The document body, though heavily obfuscated, contains the same redirector URL, suggesting its primary purpose is to redirect users to malicious infrastructure.

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/pify?keyword=bsp+thread+dimensions+table+pdf
    • http://files.omanroadshow.com/uploads/1/3/0/7/130776841/kasulojemuv.pdf
    • http://files.metricsconstruction.com/uploads/1/3/2/8/132814302/sadadiwuwu.pdf
    • http://files.finewillrockthehouse.com/uploads/1/3/2/6/132695732/tavajulize.pdf
    • http://files.arlingtonlimoco.com/uploads/1/3/1/3/131398076/2551131.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0335/files/44637469763.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/gaxepegagina.pdf
    • https://cdn.shopify.com/s/files/1/0438/8428/2008/files/angular_4_tutorial_for_beginners_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/clinical_pharmacy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28068876324.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/70768982751.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/gawenipisudenire.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/30151077184.pdf
    • https://cdn.shopify.com/s/files/1/0429/9060/0355/files/vazikot.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/40649682927.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/26729500418.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/37038907403.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_off00007ca6.bin
7da0f19c9bf812c05e04b07d79a6bf145145851659e160cc9352dbedaa05d076
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA6 5260 bytes
font_01_sfnt_off00008e53.bin
1e9fe4a000c8a432f205e84e71900191d45c1a0eacd54a50e3fb167f59cd53eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E53 13876 bytes
font_02_sfnt_off0000ba32.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA32 4324 bytes