Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce08ca9d1162a7d…

MALICIOUS

PDF

91.2 KB Created: 2020-08-30 00:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddc16006230b054b92233bedc500febb SHA-1: 3f7758046f8e8628de2a7120a79f2d5b193f1d12 SHA-256: bce08ca9d1162a7d709da2d8851ac0dd3dff0e72e28c74f7c796f0f94165501a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF was flagged as malicious due to a critical heuristic firing for a link to a known malicious redirector. The document body contains the same URL, suggesting it is the primary lure. The ML classifier also strongly indicated maliciousness. The presence of a malicious redirector URL indicates the likely intent is to lead the user to a site for phishing or malware delivery.

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.com/wix?keyword=spider-+man+into+the+spider-+verse+r
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/28806720163.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/bojijabak.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/real_housewives_of_beverly_hills_torrents.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ad4e55b4ba84abeaf4b87e3f3fd2a3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e249243c1c0d49b1983b49ea1d752657.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_988c93e77a7a40ef97d1741740b23051.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d6deec0ed734868ab6adadb3c7a2167.pdf
    • https://static.usrfiles.com/ugd/8127dd_5687d51daf8a41caa5555172123962f3.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/golongan_antasida.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/tetaretenirubunuloka.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/pekekafeje.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/volosifafalo.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_off00011a22.bin
069104d87de477a0ee251517dab643841aa4bff307fb75ec7a5187a2bfe4264c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A22 5148 bytes
font_01_sfnt_off00012b71.bin
1df692ad1a543d2f711ed066c8def60184e8d09fc4cc5048a5ebc65e7c3dda08
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B71 11200 bytes
font_02_sfnt_off000151b3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x151B3 4324 bytes