Malicious PDF — malware analysis report

Static analysis result for SHA-256 01327ab20c5ab4ee…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 05:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e15d9418330bf59ca74bfed1fc3f411c SHA-1: 46ec0fab2fd79078b0b818613f4c209e6c21aced SHA-256: 01327ab20c5ab4ee3a64be00e829bc0a5bebbfcb477b56cd73d337b58efae8f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically `https://ttraff.cc/pify?keyword=windows+7+iso++64+bit+free`. This indicates a social engineering attempt to trick users into downloading potentially harmful software. The ML classifier also strongly flagged this PDF as malicious.

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=windows+7+iso++64+bit+free
    • http://files.gabriela.is/uploads/1/3/2/6/132681698/fuwexubekoli.pdf
    • http://files.theleannefund.org/uploads/1/3/2/6/132696112/77b61946db8c54b.pdf
    • http://jogemexal.phillytypewriter.com/uploads/1/3/0/7/130739695/xisefinilu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2363/7399/files/43594072217.pdf
    • https://cdn.shopify.com/s/files/1/0437/2611/0888/files/manual_basico_de_administracion_de_empresas.pdf
    • https://cdn.shopify.com/s/files/1/0435/2383/4024/files/comune_di_campoformido_imu_2019.pdf
    • https://cdn.shopify.com/s/files/1/0448/4002/6273/files/abnormal_psychology_david_barlow.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/44334877852.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/dowiruxotarilatenivixoxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/8618927112.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/conformation_of_cyclohexane.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/jukobinifonolixepuxa.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_off00005f13.bin
2c40a0ffabaa015dd10faab0d124a769a7384ba7d8ed27587dd9d99b84975b81
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F13 5224 bytes
font_01_sfnt_off0000710e.bin
53b7d5ed9524fc728f2ff8dc382f5edc00b03522f679661ea9545e31f0667dcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x710E 10244 bytes