Malicious PDF — malware analysis report

Static analysis result for SHA-256 118498d945073ed4…

MALICIOUS

PDF

39.7 KB Created: 2020-08-22 15:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab1ab8afd20708b52413b261c94dc287 SHA-1: e8e6a607ba4a4ff43075c78bfbc14470e472aa40 SHA-256: 118498d945073ed4ed449127351dafd36ab7b593363040774df6834ed73f8988
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning attempt to distribute malicious content.

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=crystal+reports+select+case+default
    • http://files.whitehouse.edu.pk/uploads/1/3/2/6/132696117/9131993.pdf
    • http://febizovi.mrbdabms.com/uploads/1/3/2/3/132302780/jibiwipo_doniwanixine.pdf
    • http://files.saintjosephsculturalcenter.org/uploads/1/3/1/8/131871568/3cb3d.pdf
    • http://files.jennifershueyart.com/uploads/1/3/2/6/132681144/4467779.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/65605057235.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/constancia_antecedentes_disciplinarios_de_procuraduria_en.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/mawaxoguwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/kibevilubamobijik.pdf
    • https://cdn.shopify.com/s/files/1/0441/4518/0824/files/zixuwarofub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/53390923906.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/99891054157.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/86150472050.pdf
    • https://cdn.shopify.com/s/files/1/0432/2725/0848/files/functional_classification_of_roads.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_off000058cb.bin
27c82b4d953cd27fc43753c0bf293ebbc564abc5353f72ceb2533653a27659b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x58CB 5156 bytes
font_01_sfnt_off00006a68.bin
781ba4a1e39fd33b35f17fae7fe6fa1cead60e3e1f036d2d32978f51bf8b30e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 11904 bytes