Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f38cc92cb1fcfbc…

MALICIOUS

PDF

52.6 KB Created: 2020-08-08 19:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 267411dbf66549bc0701c20db880272a SHA-1: d4581655b9aa1e68401fd02ee90dad9c19ba314f SHA-256: 3f38cc92cb1fcfbcd7748cda48e688d00b113ba1408d85798e0a809d076cd6f6
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document about deductive and inductive reasoning. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic fired, pointing to the ttraff.ru domain. The document body, though heavily corrupted, contains the same topic and the malicious URL, suggesting a lure to a phishing or malware distribution site.

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.ru/pify?keyword=difference+between+deductive+and+inductive+reasoning+pdf
    • http://files.cmpa-apmc.org/uploads/1/3/1/1/131164524/linotuteta.pdf
    • http://xilira.ptcwyoming.com/uploads/1/3/1/3/131378780/tujajepenoliselunaji.pdf
    • http://files.teresaannette.com/uploads/1/3/1/4/131454106/fd4c9ad.pdf
    • http://files.frederickcitybaberuth.com/uploads/1/3/0/7/130739474/3e7887a1c22155.pdf
    • http://files.charitysportfolio.com/uploads/1/3/1/1/131163859/zepotirifexok.pdf
    • https://cdn.shopify.com/s/files/1/0435/4696/8218/files/39672689331.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1716/files/fufejojezozebexonuxipe.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/86748046308.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/69099709269.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/www._bsf._nic._in_recruitment_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/bolosebupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/kenmore_refrigerator_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/gakexizenusevobo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/30978535926.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3186/files/chemistry_zumdahl.pdf
    • https://cdn.shopify.com/s/files/1/0440/4278/0837/files/process_of_delegation_of_authority.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/velejurivupojuvumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/vefirijejimux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6052/7265/files/pdf_annotation_onenote.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_off00008e50.bin
75418cba06d0869975c458a4b99d0d94522cc5cdca3a3e3c8e0e77d497b4abc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E50 5580 bytes
font_01_sfnt_off0000a178.bin
4038d7d716e910e393e8196768581791f0eba57ccbf471a0cf4c855618e0f5a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA178 10504 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.