Malicious PDF — malware analysis report

Static analysis result for SHA-256 60246e088e21021a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 01:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb5f981b7b4b20c6445dae695a3bc924 SHA-1: f578524066f2ac0264ff818b2cadbec7255b9a17 SHA-256: 60246e088e21021ad117c73f4b69437e1e90e99254c9a8e586917d60ac71e1d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to funnel victims to further malicious sites. The document also contains a large number of external links, suggesting a link farm or a phishing lure. The ML classifier strongly indicates malicious intent.

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/wix?keyword=ib+learner+profile+activities
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6240f8_0ad50d8fbf5b47bba5cc1c542dd465f2.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_2851832663034a95b5eb71526aa34085.pdf
    • https://static.usrfiles.com/ugd/225520_b00f4e571d6d4cbeafb5bc7ba1be4f9d.pdf
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/20776350608.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5151/files/cellule_vgtale_et_animale_comparaison.pdf
    • https://static.usrfiles.com/ugd/a64c8c_6f96fcd210364b3d8af1dc86cf044a03.pdf
    • https://static.usrfiles.com/ugd/5b9a87_4b4da1d7b10b406cad895b050504eab2.pdf
    • https://static.usrfiles.com/ugd/ae059d_45ab5a2daba04477988818d7b5998e83.pdf
    • https://static.usrfiles.com/ugd/a31856_e8525f37c23e4450bda7bcb1428a70e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_36015bfecebd4de887802a544476f7cb.pdf
    • https://static.usrfiles.com/ugd/d3758e_02ec7b1733844573988ec10a98c5947d.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_off000064bf.bin
3308b4edadf0fe4e5e4e8d912e067578d4dd4616821ac9b855ac1f8a050bcc14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 5144 bytes
font_01_sfnt_off0000764d.bin
cc02325b007502b7f1a1bde51d2714ed39d85bcfbfc04a77454f16efac5f9429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764D 10492 bytes

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