Malicious PDF — malware analysis report

Static analysis result for SHA-256 171c096f4fd21795…

MALICIOUS

PDF

59.5 KB Created: 2020-07-09 11:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c6f1b6942020e5cfa5361b72dc275a0 SHA-1: b367c7ff72dbd6c68ebcf191a6cd9a5a6a2cabb1 SHA-256: 171c096f4fd217959420b6f2dd7c6cadea8689caf9300196be054fabe1132c60
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=japanese+culture+worksheets', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's purpose appears to be to lure users into clicking these links, potentially leading to malicious sites or further downloads.

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.ru/pify?keyword=japanese+culture+worksheets
    • http://files.athenscountyantiquemachineryclub.com/uploads/1/3/0/8/130873736/bewugaru-gojibosaxesep-nefakunuzalilif.pdf
    • http://files.paperboyproductions.net/uploads/1/3/1/4/131455463/6567438.pdf
    • http://files.revmelodyann.com/uploads/1/3/2/6/132680869/loguduwaxemodaxul.pdf
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdf
    • http://files.rangeroverclubsa.com.au/uploads/1/3/2/3/132302764/334420.pdf
    • http://files.music-in-hospitality.com/uploads/1/3/1/3/131384214/wotos-gejuzibofulanop-xupewo-roxusulosuburo.pdf
    • http://files.creativecounselingsrq.org/uploads/1/3/2/7/132710787/5366484.pdf
    • http://files.globalisationandcities.com/uploads/1/3/1/6/131607174/jilaxafufusekiw.pdf
    • http://files.mrgatewoodcody.com/uploads/1/3/1/0/131070289/gililegaxepajilu.pdf
    • http://files.4arrowsoutdoors.com/uploads/1/3/0/8/130814672/1910526.pdf
    • http://files.thehealthyroot.com/uploads/1/3/1/3/131383645/66cfb0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://maforebe.files.wordpress.com/2020/06/busaditunarelizira.pdf
    • https://vigupowiri.files.wordpress.com/2020/06/wabilikolamu.pdf
    • https://doxurare.files.wordpress.com/2020/06/92807842131.pdf
    • https://bobiresa372961564.files.wordpress.com/2020/07/wadibiwipi.pdf
    • https://kavugas.files.wordpress.com/2020/07/gomabegobim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90554838216.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009542.bin
fdf934590ac0eb5f3a99140fdddb0db627a16723f02925584dffc2ef48127cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9542 5872 bytes
font_01_sfnt_off0000a975.bin
5ca18a681dabe968c6bbd96423300b97c7360c4d7932cfd6c9098e8e13fb3c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA975 5000 bytes
font_02_sfnt_off0000ba77.bin
b7dfb8e9cc11b62fe74eeb7de423b26eae8e468ef9bd0bcff7ad7135bcbe20c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA77 11584 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.