Malicious PDF — malware analysis report

Static analysis result for SHA-256 0194c464be4a1ed0…

MALICIOUS

PDF

42.9 KB Created: 2020-08-29 22:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 253987a720ba60785fb26875dae42abe SHA-1: 60a79b98bcc066beab45e028ad7b747a0b2ac25c SHA-256: 0194c464be4a1ed005107f039b5b872a1db2c5d0e0825ca3f55ec1f930255675
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.ru'. This suggests the document is designed to lure users into clicking malicious links, potentially leading to further compromise.

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/wix?keyword=i+know+why+the+caged+bird+sings+literary+devices
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5682/3453/files/14479217095.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5084/files/41013870663.pdf
    • https://cdn.shopify.com/s/files/1/0434/1668/2663/files/video_converter_to_mp4_online.pdf
    • https://cdn.shopify.com/s/files/1/0436/4114/3454/files/jadujada.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_70153d93384c45058b6dc1d6acab79e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0df2ae76987490d8f3634061c7a0593.pdf
    • https://static.usrfiles.com/ugd/6c032c_91046dec45644d429dd1993b0a257ce1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/tipibeboxax.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/79103149223.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/rokimos.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/chemistry_notes_for_class_12_free_download_up_board.pdf
    • https://cdn.shopify.com/s/files/1/0440/2587/2549/files/blaulichtreport_saarland_dillingen.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a1d.bin
4269a4dcf45cebd8d3abc794ee70ff18652493a5f4fdc12220411171b2ff847f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1D 5596 bytes
font_01_sfnt_off00007d3e.bin
18e41c7401a92756506067eb9048be9a320741c092da532960462b0a2040f09e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3E 9764 bytes