Malicious PDF — malware analysis report

Static analysis result for SHA-256 6caa0e67afa34944…

MALICIOUS

PDF

36.4 KB Created: 2020-08-26 09:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94729d5a5c40d18ed0bdab6a7fed64f2 SHA-1: c7d396dba5d4bb2019dc29b22ca22cb777ed4f6a SHA-256: 6caa0e67afa34944b34cbbb879ce7cba60e94bf9b29f3ce1bfda85b5693ba70b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is likely used to lure users to malicious content. The document also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm. While no scripts were extracted, the presence of a malicious redirector and the ML classifier's high confidence suggest a malicious intent, likely to deliver a secondary payload or phish credentials.

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=font+browallia+new+windows+10
    • http://files.drakeuniverse.com/uploads/1/3/0/9/130969079/e0bea7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/14599307849.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/kalabhairava_ashtakam_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/28643924694.pdf
    • https://cdn.shopify.com/s/files/1/0435/0846/5828/files/9194884555.pdf
    • https://cdn.shopify.com/s/files/1/0436/1220/9315/files/soil_humidity_sensor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/jumif.pdf
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/vufudalaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/3796/5979/files/formwork_carpenter_jobs_dublin.pdf
    • https://cdn.shopify.com/s/files/1/0440/8636/2264/files/48536808098.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/95179042741.pdf
    • https://cdn.shopify.com/s/files/1/0453/8662/9288/files/18350785071.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/88776836619.pdf
    • https://cdn.shopify.com/s/files/1/0439/9477/5710/files/pioglitazone_davis.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_off00004460.bin
9ce61984af0048683449c2d4bf0ce85f5937dda0819286c0d242e95426c17643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4460 4988 bytes
font_01_sfnt_off00005564.bin
b5cf84da31e226240bdc5938b4130525598f876bd63bff18c53afb7295b4ed4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5564 9676 bytes
font_02_sfnt_off00007675.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7675 4324 bytes

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