Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdffab6471930c45…

MALICIOUS

PDF

81.0 KB Created: 2020-08-01 07:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e27897ef3edf484a92c7d1908b67de9 SHA-1: 2077c8196d60e032787415066127b4536bd90f4c SHA-256: bdffab6471930c4580272dd18e7200bbaac10e6ce92a62d25321e5b094010a69
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=notsobot+invalid+search', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the malicious redirector URL, suggesting an attempt to lure users to malicious content.

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=notsobot+invalid+search
    • http://files.myskiped.com/uploads/1/3/0/8/130874451/giwikuped.pdf
    • http://files.cdsn.org/uploads/1/3/0/8/130873855/7566203.pdf
    • http://files.dtranquility.com/uploads/1/3/1/4/131437247/4028671.pdf
    • https://cdn.shopify.com/s/files/1/0428/2220/5607/files/kogubibekukime.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/zemifavozadokinifofafewa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/rimizebugugubuwijibir.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/vizio_universal_remote_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tosinumemelijigejidab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/tevafas.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/rixizepelokomutinugatuwot.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/wulotupazudi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/gamefasozaxevideled.pdf
    • https://cdn.shopify.com/s/files/1/0432/4861/5579/files/35606398369.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/18197598091.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/82777965689.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da54.bin
1aabfe52ab2d96ec2bd0d90c56318e3916128968dd1eaabfb4e7f81bdddb0d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA54 5196 bytes
font_01_sfnt_off0000ebf1.bin
e8def34ef7fa1cd1e737aa53281a1ad4be732a20e453453846aa670fb207f4af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF1 2044 bytes
font_02_sfnt_off0000f55e.bin
c9315b06be3f799c4af5174364479bcabe83367f3da340c8791fdf784a649f06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF55E 13300 bytes
font_03_sfnt_off0001209a.bin
fd5676b9bb60be15a9672d42681bdedf4a9c9d15c13fcf31810e4aa2be29fe84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1209A 16208 bytes

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