Malicious PDF — malware analysis report

Static analysis result for SHA-256 915bb6872f50f17a…

MALICIOUS

PDF

34.4 KB Created: 2020-08-08 17:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 978bfd139adcb9af3b9fd430adbb6495 SHA-1: 9fcfa5fbae84e1dbf3be1aede6a486fca9798911 SHA-256: 915bb6872f50f17adb1a193939c6898f29f58790cfd90d296f7c7bc847a7559b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a link to a PDF about 'access consciousness libros pdf'. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, many hosted on Shopify. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=access+consciousness+libros+pdf
    • http://files.alphachichico.org/uploads/1/3/2/7/132740234/2485425.pdf
    • http://files.moonhighclassof1971.com/uploads/1/3/2/7/132741128/roporijekakif-rexumopugoz-vezuxaxezuxiga.pdf
    • http://files.cafe160order.com/uploads/1/3/1/4/131406348/9151546.pdf
    • http://vefumuvov.wylieeasttheatre.com/uploads/1/3/0/8/130814397/mawidenika_kidom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48787523288.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/rogadufigatalefudutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/54999233539.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/40585055812.pdf
    • https://cdn.shopify.com/s/files/1/0443/8815/5558/files/ectomorph_training_program.pdf
    • https://cdn.shopify.com/s/files/1/0438/9945/3608/files/7089444626.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/vedoreju.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/vepuzoleb.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/rapozidugapoxejurizox.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/7_days_to_die_mechanical_parts.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/84211510956.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/dajenaniwovuxikunedagumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/19039464976.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/toledini.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_off00004a48.bin
0f9f9425766af2f0da1e063ec55cdb456752ef54b0c3ab5e17afe93f4f9f81b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A48 5068 bytes
font_01_sfnt_off00005b8f.bin
b8102f4c04462425ba81ccd635f8d707c6222075ffc1b5152f7b64101f1c96dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8F 9692 bytes