Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af800e3700fca38…

MALICIOUS

PDF

63.6 KB Created: 2020-08-02 22:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bedd62eaf724cb73a01121afd73067e SHA-1: 2b7e274f4955d6f4cd19fda64ce0ab0a77bb0143 SHA-256: 0af800e3700fca385be635b8fa09849152106c0fc0eb29a3d2dacc5851539f7d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the malicious URL is a strong indicator of a phishing or malware distribution attempt.

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=k+project+kissanime
    • http://files.victoriacableart.com/uploads/1/3/2/6/132695543/2f7e6d415f85f.pdf
    • http://files.roundislandlightmichigan.com/uploads/1/3/0/7/130775677/2998554.pdf
    • http://files.hfchurch.com/uploads/1/3/0/8/130814636/filisazijebi_ribiwajon_wivoliwavafetog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/50828313188.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/dart_tcp_socket_server.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/74982257534.pdf
    • https://cdn.shopify.com/s/files/1/0428/3262/5831/files/82910733850.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/banen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jezimix.pdf
    • https://cdn.shopify.com/s/files/1/0436/0794/9475/files/dodge_truck_repair_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1338/files/fimarapujapipirupoxip.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/40360089120.pdf
    • https://cdn.shopify.com/s/files/1/0434/9588/2918/files/calculus_7th_edition_stewart_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2736/files/beloju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae8.bin
9af47d7b9d0e7833b5ab1c248dcaff7a18909beab09b0accf6e475f1d976e54c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE8 23616 bytes
font_01_sfnt_off0000b5c8.bin
d72f16dc067dffa5186fbc580d62f6db6152c64d84660e1832828aed90ccc10b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C8 5156 bytes
font_02_sfnt_off0000c743.bin
8df824a86bcd770232471efe3a406258110ebf64d8b9b0da4c09e2da46aacb34
pdf-font-stream PDF embedded font (sfnt) at offset 0xC743 13224 bytes