Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ce131c20f5b5d8…

MALICIOUS

PDF

47.2 KB Created: 2020-08-29 04:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4d13b1a909351656f202919335aa2a9 SHA-1: 085f30caa060eccc12f8b8d17fed6ab2ed27fd23 SHA-256: 34ce131c20f5b5d8a915d5076194cb26e8ff370c2c9ceecbc90277091dc05f14
152 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.com'. The document body, though heavily obfuscated, contains this URL and other URLs that appear to be part of a link farm, likely for SEO manipulation. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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.com/wix?keyword=pelicula+la+sombra+del+caudillo
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/william_marrion_branham_sermons.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9701/files/sidasawubirije.pdf
    • https://cdn.shopify.com/s/files/1/0436/7872/8345/files/organizational_chart_template_excel_2010.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4171/files/nebolilakulepatufesukuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/55416875266.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/zakopepajujaxopimitagod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/naxop.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfa958c937ce4565a5b468cbf3d886e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_af8efbe698fa4e498c6bdc545e84aa6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_17772981c6da43f3936d302466e8daf8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d08a0134108a41e787762ba4e8b11739.pdf
    • https://static.usrfiles.com/ugd/b8c837_462a32b997ce4dbf8f8589a801444202.pdf
    • https://cdn.shopify.com/s/files/1/0435/4437/9551/files/water_treatment_essentials_for_boiler_plant_operation.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/yard_machine_8hp_snowblower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/38185473464.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/19987988093.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_off00006b05.bin
746d18fe9afe241ae3efe77c79e78f1861ce0788637a94decb6caaf211055619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B05 4920 bytes
font_01_sfnt_off00007ba9.bin
f60b633a3205a33cad1771b23d2807422b10f929a131473f91d4820e0bf0cf60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA9 11264 bytes
font_02_sfnt_off0000a030.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA030 4324 bytes

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