Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c7593299283b82…

MALICIOUS

PDF

37.2 KB Created: 2020-08-02 18:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d923ceab9d4e9c0919e35764ef140fb5 SHA-1: e9ea4b275bbfdac8b6b5e9cd50a6af937fffadd8 SHA-256: 38c7593299283b82a6643841120a503d4bd43f7e08d7dd5d948248e8f25edb98
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body text, though partially obfuscated, includes the string "Play skool camera" and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicated maliciousness.

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/pify?keyword=play+skool+camera
    • http://files.mccleeryequinevet.com/uploads/1/3/1/3/131380651/7664138.pdf
    • http://files.lightonwatertcm.com/uploads/1/3/0/7/130775859/a9b9e.pdf
    • http://files.phillipsburgcomiccon.com/uploads/1/3/1/8/131856569/jumagepapije_nixonuzuxi_fawiwa.pdf
    • http://files.thechocolateopal.com/uploads/1/3/1/4/131408970/bonekigoj-finiluw-wemeguru.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/tetojakojukevanepo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1465/files/43128524125.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/walajeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/felatigijigozuwaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/79153687825.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/21883152921.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/52971236140.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/50435953822.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/lilarekawiloxarosolowula.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/71737880503.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_off00005231.bin
56d76b36e2890d054829fc6207c79edff570262689728936badd3ff4aaff7e90
pdf-font-stream PDF embedded font (sfnt) at offset 0x5231 5112 bytes
font_01_sfnt_off0000638c.bin
c6865a64c5bd9f0402fffbc13b718110c508439dab1749c272b8f88f5695302e
pdf-font-stream PDF embedded font (sfnt) at offset 0x638C 10416 bytes