Malicious PDF — malware analysis report

Static analysis result for SHA-256 050e98544212d601…

MALICIOUS

PDF

38.8 KB Created: 2020-08-24 14:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77e551a8b699669e42443bad1b806cca SHA-1: 973323b55f92901fd40f5374756014af0741015e SHA-256: 050e98544212d601889307f0a9c18d26ffa114175fcb2480e7c8c8bdcffdca5a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Breville dual boiler manual'. The presence of a malicious redirector and a link farm suggests an attempt to direct users to malicious content or phishing sites. No scripts were extracted, but the PDF structure itself facilitated the malicious linking.

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=breville+dual+boiler+manual
    • http://files.paintthepeninsula.org/uploads/1/3/1/4/131437655/gumajog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8135/0820/files/noguwifefon.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/kipuf.pdf
    • https://cdn.shopify.com/s/files/1/0450/9591/1577/files/thesaurus_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/vuejs_component_without_template.pdf
    • https://cdn.shopify.com/s/files/1/0462/5996/2007/files/sileruwegelob.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8922/files/bohemian_rhapsody_partitura_guitarra_clasica.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/nufesipizeroreke.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/47012079930.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004426.bin
8ff23c4a31bf1bfe58a591c0b3925b4a5f6512a1d576152e5160b433311c4f4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4426 5040 bytes
font_01_sfnt_off00005534.bin
c366c7f9b94232a38f2b45cd2d6f96f359237c6590f0a2b96fdeea3c2acf5cff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5534 10196 bytes
font_02_sfnt_off0000784b.bin
836ab3fafa1d23e35e14e192ec86be8fe8e931eee4b8c79d5c7bf23088570f18
pdf-font-stream PDF embedded font (sfnt) at offset 0x784B 16136 bytes