Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c634674282cf5d…

MALICIOUS

PDF

46.5 KB Created: 2020-08-15 02:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4bf51c3f8052959f56936e8df992e55 SHA-1: d23f79da460d81b551f4e6b9579ddb652e4127a7 SHA-256: 78c634674282cf5deee81d69cf9d0eaf3c1625cd7d8e5e94210c7cf08cee40ce
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=patavar+basle+song'. Another heuristic indicates a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The document body contains garbled text but also includes the same redirector URL and several Shopify URLs, some of which are benign. No scripts were extracted from this sample.

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=patavar+basle+song
    • http://files.eproming.si/uploads/1/3/1/6/131606133/f8ccf16.pdf
    • http://files.vanesanieri.com/uploads/1/3/1/4/131438676/9901502.pdf
    • http://files.chargerchoir.com/uploads/1/3/0/7/130776487/9216963.pdf
    • http://files.livestockhub.net/uploads/1/3/1/1/131164027/tiwox_nopesutuwejif.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/85500828257.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/cutting_edge_elementary_tests.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4485/files/bikodoreludosupasifefux.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/chair_exercises_for_seniors.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/foxagoreduv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/vifululodumadatuvulojaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/ielts_reading_test_samples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/4567/5420/files/30870637896.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/17181727526.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/92467912663.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.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_off00006078.bin
f8348feb47be2d91477a636931c2cc9e2c11a93a412a4cbd74a0a5b011dd0076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6078 5052 bytes
font_01_sfnt_off000071c3.bin
5b9a844b803419daf1eee59b23d29a972712fe67e14e1b46a489e11eb7f836d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C3 14832 bytes
font_02_sfnt_off0000a07e.bin
5ad50a36ce8e1a1721220b949608f370c591362ec6eb20ba4a88b8b7bd0ed3a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA07E 3184 bytes

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