Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b63f07babc509a…

MALICIOUS

PDF

46.9 KB Created: 2020-09-01 02:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0563bc7e9147295285db7f561b7953c2 SHA-1: 46103f32b07cb2a580dc694a5420aa851420696d SHA-256: 67b63f07babc509a2fd85db2e4dae94dad3c2c2f7508f17ba1f6a059d18f1ce3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links, 'https://ttraff.me/wix?keyword=alarm+app+android', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure.

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.me/wix?keyword=alarm+app+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/fulipate.pdf
    • https://cdn.shopify.com/s/files/1/0454/6861/4808/files/ukulele_songs_easy.pdf
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/37978103654.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/murajimera.pdf
    • https://cdn.shopify.com/s/files/1/0435/3546/6655/files/49559910276.pdf
    • https://cdn.shopify.com/s/files/1/0437/2919/1066/files/bosch_automotive_handbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/0155/0760/files/gikufedevibewotumuxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2287/files/rumabivomenajofukevor.pdf
    • https://static.usrfiles.com/ugd/e2c250_282065dbab7a4579a342e629bf8531c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f52213360b5940f59a8611a098400615.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/winows_xp_service_pack_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/greek_mythology_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/vakeginakobofudodegiso.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_off00007a84.bin
a8feb9c36425b64e9d172de9d8b5349885d989e1fc74d7caa335cfd25eb5eeab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 4916 bytes
font_01_sfnt_off00008b22.bin
7ad102836658ede4d56ddf077bd23ddbea542710b48584683a1bac326e1c7267
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B22 10524 bytes