Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc797388d389bb7…

MALICIOUS

PDF

53.3 KB Created: 2020-07-30 21:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 161bd6b1be0781d8b015a2f25e815914 SHA-1: e83c6cbc842ff3397b628877e00c550ae32598a9 SHA-256: 7dc797388d389bb7c38af529f64ec9394ae35dcce0b38c225fb39b5659c43f43
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search results or distribute content across many sites. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic to hide malicious payloads, implying this PDF is part of a larger distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=computer+topology+pdf+notes
    • http://files.lrcboutique.com/uploads/1/3/1/3/131383942/272594.pdf
    • http://files.mindfulmomentsinedu.com/uploads/1/3/0/7/130776728/55b799e6158e.pdf
    • http://files.pandawelding.com/uploads/1/3/0/7/130776592/2220704.pdf
    • http://files.skyviewbaseball.org/uploads/1/3/1/4/131453294/3c686.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7820/6111/files/15357139621.pdf
    • https://cdn.shopify.com/s/files/1/0429/2516/2652/files/28713635969.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/samekadewinijakira.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/gaporo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/33898940088.pdf
    • https://cdn.shopify.com/s/files/1/0439/2560/2472/files/87701277023.pdf
    • https://cdn.shopify.com/s/files/1/0438/4374/7990/files/salujuzivikamisasu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/74194557391.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/rozipurukuzixesixagol.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/27180406592.pdf
    • https://cdn.shopify.com/s/files/1/0431/3104/4007/files/susuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/nokijewadobim.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_off000095a8.bin
34b62998c5b31feef114ba65ed246c894fa34c76380f30dd6ca651d5c77e8956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A8 5108 bytes
font_01_sfnt_off0000a704.bin
80ea08eb79bd18cd940859a8d7771ea151d6a5ece0bd6f59c6e790d192580529		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA704 9636 bytes

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