Malicious PDF — malware analysis report

Static analysis result for SHA-256 33506a5f1d4a54e9…

MALICIOUS

PDF

45.2 KB Created: 2020-08-29 02:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb9b85bdbf18bc7f7c9fde5b172c14f5 SHA-1: 18533282278aa190e6675bfc1090d6e87e8eb339 SHA-256: 33506a5f1d4a54e9965cc1e7e3b0e9b91821fba768bd991e9bf7e0d4cad2abea
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=used+suzuki+aerio+parts'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body contains text related to 'used suzuki aerio parts' and the authoring application, suggesting a lure to entice clicks on the malicious redirector.

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/wix?keyword=used+suzuki+aerio+parts
    • https://cdn.shopify.com/s/files/1/0440/5349/5958/files/ejercicios_resueltos_alcanos_alquenos_y_alquinos.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/80123447596.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/taxejafax.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/65781027891.pdf
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/pusevolemir.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/lenifipubemugod.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbd8ab50c4df4581ad58a26c6cab1222.pdf
    • https://static.usrfiles.com/ugd/b8c837_14170206c1c74eaca49206bd59230354.pdf
    • https://static.usrfiles.com/ugd/b8c837_598d6818cebb42b9a47e2967aa1b1525.pdf
    • https://static.usrfiles.com/ugd/b8c837_a77677dbcb4b448a8aa4d3c41675b922.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbc1a33656694093b4b3582e9f56fbf5.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/94015749921.pdf
    • https://cdn.shopify.com/s/files/1/0429/2807/9004/files/doweg.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9366/files/nisesoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/the_best_trendline_methods_of_alan_andrews.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_off000063ce.bin
b24fece6236456218bcc9c4fbec423081e16480e9ec301687cd492071d06087e
pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 5024 bytes
font_01_sfnt_off000074fb.bin
86bd395eda86b84353031a6a1c7beaa66e7b143b72314931937a28c88eafb8d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FB 15780 bytes