Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7497e47aef5af8d…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 21:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27c4436e40e3ac1f8c71e25eb60024ef SHA-1: 491a90eb401d138a08c5cee414399caf760868ed SHA-256: f7497e47aef5af8d5d4d9146e29bbaa15f9868bf3ead82aa5206351ebbc2c549
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=librecad+templates+a4'. This indicates the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted from this sample.

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/pify?keyword=librecad+templates+a4
    • http://xuleg.bellaandpolly.com/uploads/1/3/0/9/130969868/1019b4a2f88.pdf
    • http://vinuvaj.themidnightblogger.com/uploads/1/3/0/7/130738531/d24a861b0e170f.pdf
    • http://gorijex.thevioletvalentine.com/uploads/1/3/2/7/132740435/vebodokifow-tunafalefa-dujek.pdf
    • http://files.commercial-doors.co.uk/uploads/1/3/0/7/130776351/f2109f4f.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/43228142477.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/gifajakugefokarimemadawe.pdf
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/silmarillion_knjiga_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/8239655489.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zitadeduwifugegumav.pdf
    • https://cdn.shopify.com/s/files/1/0438/4499/3181/files/futusanumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/sql_server_extended_events_error_reported.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/android_x86_installer_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/guitar_chords_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/sozonidub.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_off00005d76.bin
1cbd011e4782eb1640a8af520443e88ff128df4e8f3a8204299805df1bfa4a0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 5388 bytes
font_01_sfnt_off00006fad.bin
54ce84a5834ab5b6635ba9338a83c80f569d95e41f6f7a5d8f37e41999227afd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAD 10296 bytes