Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f9eef18f1df856…

MALICIOUS

PDF

40.2 KB Created: 2020-08-06 12:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d041156e79062ed64bcb76b17ab6bd60 SHA-1: 42c1f5d9fc739f1fd78fb9a427a8bff8ece0e462 SHA-256: e0f9eef18f1df8566c1866c3c0822fa94624f0e14da2b7f3241434caa9ab0a95
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=descargar+antecedentes+contraloria+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. These factors suggest the PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware delivery.

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=descargar+antecedentes+contraloria+pdf
    • http://files.gemmamcneill.co.uk/uploads/1/3/1/6/131636725/relenavurasivax.pdf
    • http://files.eldaag2019.com/uploads/1/3/2/6/132682627/4689018.pdf
    • http://files.pbhomephysio.ca/uploads/1/3/0/8/130813747/7865323.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/weeks_in_a_year.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/48639675728.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/84837309891.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/22461077195.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/zatixevape.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/asc_606_pwc.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/xomuvolezizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/um_admiravel_mundo_novo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84407481133.pdf
    • https://cdn.shopify.com/s/files/1/0437/9167/9648/files/pocatello_weather_radar.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dcf.bin
b1f4218fde965f0bc96d42d1d0de9aff009fb5781a529d4b07f7f9c4c449a0d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCF 5320 bytes
font_01_sfnt_off00006ffb.bin
e3fbc1159b223b6755a3f154da5f5b51314d146ddcb9be22fd34fea4e417d24b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFB 11136 bytes