Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ef3e173aa6650b…

MALICIOUS

PDF

50.1 KB Created: 2020-08-25 01:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbed119f2fb35854ce0678b664419e4c SHA-1: fbde3aea8c4510b56b78de5770a33af219c6b2f8 SHA-256: 64ef3e173aa6650bc4f769dd64d78c08bfb46ca9b9bc08e4ae193ceeddae1b4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to what appears to be a link farm designed to mimic academic resources. The primary malicious indicator is a link to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains references to the target URL and the file's apparent purpose as a link farm.

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=alligations+and+mixtures+pdf
    • http://files.chemistrylabmanual.com/uploads/1/3/1/3/131380052/2487410.pdf
    • http://files.thekaleidoscapes.org/uploads/1/3/1/6/131606397/6fc04cea490aa.pdf
    • http://jupijam.autosearjig.com/uploads/1/3/1/4/131406390/ef4ac.pdf
    • http://nekudo.shawngrewal.com/uploads/1/3/0/8/130814328/bda42942a331d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9206/6975/files/55105750712.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/acog_guidelines_gestational_trophoblastic_disease.pdf
    • https://cdn.shopify.com/s/files/1/0439/0970/9976/files/bismillah_calligraphy_font.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0437/8443/7922/files/arbol_familiar_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/7615448621.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/lumibegutiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/balejugazarakifitibarubug.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_off00006c58.bin
452e5377e074363d396fa072cb93a41289ae2e14ac9e2a50555cd468cbdb3f2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C58 5300 bytes
font_01_sfnt_off00007e43.bin
189cdada69a6de2371ec79e8e97cbefa2207ab19007fe0fb0e610b0f5dc0c0dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E43 15300 bytes
font_02_sfnt_off0000adb6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xADB6 4324 bytes