Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed306b3bf7e2024…

MALICIOUS

PDF

61.0 KB Created: 2020-08-09 16:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7a5b8378c4915913c608943d784e972 SHA-1: 9faa0fc6cf3c9e08d4d98ff5bd32087644e43ea5 SHA-256: 2ed306b3bf7e2024e6383f26524e4381b5b887e6a454eb4d6e6115411bf6c25d
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a malicious redirector link (ttraff.cc) that is used to obscure the final destination. The document body, though partially corrupted, contains the text 'Action research and minority problems pdf' and the malicious URL, suggesting a lure to download a fake document. No scripts were extracted, but the presence of the redirector and link farm indicates a phishing or malware distribution attempt.

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.cc/pify?keyword=action+research+and+minority+problems+pdf
    • http://files.marshallstileco.com/uploads/1/3/2/7/132740399/zamajit.pdf
    • http://files.lilybrazdesign.com/uploads/1/3/0/7/130775970/2704ebe0f3.pdf
    • http://files.artfullivingmovement.com/uploads/1/3/2/6/132682758/8c2d3c76314b71.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/merumupivuduliwivero.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/kewud.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/kezobobagilujoredu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/97168784412.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/medipudasejusare.pdf
    • https://cdn.shopify.com/s/files/1/0435/4696/8215/files/10612699809.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/pupasujejenawanuwopes.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/wowofem.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/2434338127.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5934/files/anti_oppressive_social_work_practice_putting_theory_into_action.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/74311458288.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/tazaj.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_off0000a2a8.bin
2f58ae5af9193286105fe52c12a8cd4579eb438cc610c531d131bf7b481c0dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A8 5416 bytes
font_01_sfnt_off0000b4d5.bin
3859dc45c12a486d565655da5a2dfb50b02c053013aafa7a13954feaf87191ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D5 10568 bytes
font_02_sfnt_off0000d899.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 4324 bytes

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