Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbe05477a50c602…

MALICIOUS

PDF

52.3 KB Created: 2020-07-25 14:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a85cac891cbfd0e7aedbcb47defba3de SHA-1: 9eef94c3abb97ded29054f200ee68e07066d0432 SHA-256: bfbe05477a50c6025a840d762867bec8b472e09dc02dccb82581d147ee3e9311
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Catholic confirmation interview questions and answers'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The file is classified as malicious with high confidence due to the direct linkage to malicious infrastructure.

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=catholic+confirmation+interview+questions+and+answers
    • http://files.amgnational.org/uploads/1/3/1/4/131453484/6531762.pdf
    • http://files.balmdotcalm.net/uploads/1/3/1/0/131070469/lusagudodu-bejusobofepepu-vubedukufot.pdf
    • http://files.jackandjillcharlottechapter.com/uploads/1/3/0/8/130874627/48543b6cc55.pdf
    • http://files.ayumikuramae.com/uploads/1/3/1/4/131438113/9479399.pdf
    • http://files.voiceofourangels.com/uploads/1/3/1/3/131379860/61cb48de35d8.pdf
    • https://cdn.shopify.com/s/files/1/0429/4665/8463/files/10942566247.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/39114372130.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/pugag.pdf
    • https://cdn.shopify.com/s/files/1/0434/7448/5400/files/tezowonepakegajabusaji.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/42685137029.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/lepaxavufojamisusabuwavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/59338919156.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/nekumasedurogedajolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/wajibojorefofokutizov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6006/files/zaravafepuvizuro.pdf
    • https://cdn.shopify.com/s/files/1/0436/1519/1202/files/debekuxamefarunarezisebut.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_off00008d2e.bin
12761fc57da5ea0e5a6a5f04511c4c2f014756b01b39fd0ca88e52c525ed2a9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2E 5444 bytes
font_01_sfnt_off00009f91.bin
eb88d7a7c89abfbf0f35849c75def57e8146b5dad11c45737b3ea41e20f0ed9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F91 9900 bytes