Malicious PDF — malware analysis report

Static analysis result for SHA-256 78dee95dda205463…

MALICIOUS

PDF

46.4 KB Created: 2020-08-28 13:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8829b98f8a88c189b06dc7ba173ace3b SHA-1: 0cbff19166b77c4ed3aaab86bb9517a3fcf7d1c3 SHA-256: 78dee95dda205463bcbc0c1533f8c5d457e0024a1f5fe2ec83a8827387b0ca80
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a link farm infrastructure designed to redirect users to potentially malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=ines+mezine+en'. The document body itself is heavily obfuscated and contains this same URL, suggesting it is the primary lure.

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=ines+mezine+en
    • http://files.landonmondragon.com/uploads/1/3/0/7/130740589/2551643.pdf
    • http://files.gillisplayandlearn.com/uploads/1/3/1/4/131453215/kavalawizokibalo.pdf
    • http://files.factorywarrantylist.com/uploads/1/3/1/6/131636746/0d0aafb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/orthographe_illustr.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevadijuxirefasu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5427/5479/files/77732718388.pdf
    • https://cdn.shopify.com/s/files/1/0440/3704/6437/files/39105243674.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/lumetusizoki.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/opengl_tic_tac_toe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9939/files/21005561696.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9873/files/vejid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5503/0170/files/english_grammar_tamil_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/73543898685.pdf
    • https://cdn.shopify.com/s/files/1/0431/7075/8820/files/66622909655.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/97156331566.pdf
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/inside_man_full_movie_300mb.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_off00007acf.bin
0276b7045b9e61b1b6d5841b500adb02e38e79d1b5f2432aaba4be6cfefd038b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACF 4480 bytes
font_01_sfnt_off00008a02.bin
6b260937bc90b7ea7e329a9d1aa099269b1dab21bb761f526f4f194e1a8d31cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A02 10196 bytes