Malicious PDF — malware analysis report

Static analysis result for SHA-256 048a8a98fdc9249a…

MALICIOUS

PDF

51.6 KB Created: 2020-08-30 10:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32317559681d449b07f75fc82beabe46 SHA-1: 80abdb56cc29855655cf3bedb3118fd619c4ab83 SHA-256: 048a8a98fdc9249aa34ef5108dbc2d9325a109de5f5798f6d0cb99755f88852d
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous links to external PDFs, including a critical redirector link to ttraff.com. The document body, though heavily obfuscated, contains text related to a Miami post office and a URL that appears to be part of a phishing or malware distribution scheme. The ML classifier strongly indicates maliciousness, and the presence of multiple external links suggests an attempt to lead the user to 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/wix?keyword=miami+fl+33166+oficina+de+correo+n%25C3%25BAm
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/articulo_cientifico_sobre_el_cancer_de_mama.pdf
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/70185405863.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7454/files/pogebilamenunora.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/24877397068.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3082/files/36498563897.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41326774972.pdf
    • https://cdn.shopify.com/s/files/1/0447/2376/5402/files/ansys_18_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/5970149061.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/42587731931.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/4849569666.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8941/8647/files/avivahit_praman_patra_form_rajasthan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/cambridge_objective_pet_student_book.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_off00007a46.bin
9d41b72eddefaab012786df4b03ddde153467e0746342fafc5a0f730d3fbcb4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A46 5480 bytes
font_01_sfnt_off00008c9b.bin
890e48a7b495945a48b2bae508208f73130cf751893ad40cd8482292dd78a184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9B 16892 bytes

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