Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4e16c1f596c971…

MALICIOUS

PDF

105.0 KB Created: 2020-08-04 22:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59dc2ccd1e9606925956e64288c5ab74 SHA-1: acd7af05992fc5c3ae9218dd1036999b92f0e732 SHA-256: 0b4e16c1f596c9715139fc52fa3a7d38319e4c0753ecb0115cbd69f7a14fa72f
154 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple critical heuristics for linking to malicious redirector infrastructure and for containing a large link farm. The embedded URL 'https://ttraff.cc/pify?keyword=apqp+manual+pdf+aiag' is identified as a malicious redirector. The PDF structure and the presence of numerous external links suggest an attempt to manipulate search engine results or to phish users by directing them to potentially harmful 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.cc/pify?keyword=apqp+manual+pdf+aiag
    • http://files.northplainfieldpark.com/uploads/1/3/2/6/132682030/nekizadoputeg_tuxamasozidalul_mumevamibe_jipidap.pdf
    • http://files.moannasworkroom.com/uploads/1/3/2/6/132681796/gopitowi.pdf
    • http://files.kocanada-usa.com/uploads/1/3/1/4/131437538/zorodoke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/city_of_splendors_waterdeep_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/midegewukuxuwofemulub.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/fewifawepad.pdf
    • https://cdn.shopify.com/s/files/1/0432/5412/0606/files/52260994093.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/43274519272.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/10948963452.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/xolirovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9167/3763/files/tipixol.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/sokutejizuzegeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/36182945160.pdf
    • https://cdn.shopify.com/s/files/1/0433/5812/6245/files/27270478328.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/41014660317.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_off00015c45.bin
e27f3a3085e8410723a26185016816e7521b5d47d5d4f3d0d6e14ec8c9d089fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C45 5204 bytes
font_01_sfnt_off00016de7.bin
e856e3d2eed4e9194edc08423cca3e129adcb650e52039624ede049a8abb7140
pdf-font-stream PDF embedded font (sfnt) at offset 0x16DE7 12820 bytes