Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a416a49b3bd5290…

MALICIOUS

PDF

44.7 KB Created: 2020-08-13 21:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35fb099aaa7471ffdb4756a8abfd28d9 SHA-1: 4bf93b0e85b11b1ce974a95b0054f26f14532a40 SHA-256: 0a416a49b3bd529087906fab4dd88c8761a0f701e3e77b23098ec6d841e65732
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector to 'https://ttraff.com/pify?keyword=squealer+regular+font+free'. The document body also contains this URL and other Shopify links, suggesting a lure to download a font which likely leads to a malicious payload. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=squealer+regular+font+free
    • http://files.jhaytersmilestudio.co.uk/uploads/1/3/0/7/130739180/9986463.pdf
    • http://files.byobeez.org/uploads/1/3/0/8/130813357/buridoje.pdf
    • http://misinu.eurokreations.com/uploads/1/3/2/7/132710797/1350155.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/tolobaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6378/files/tales_of_the_arabian_nights_book_of_tales.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/6799320973.pdf
    • https://cdn.shopify.com/s/files/1/0432/3282/1412/files/al_andalus_history.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/foxowawozeturatizufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/dudeguxirofedurobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/foxug.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/trait_d_aix_la_chapelle.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/26786538075.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/iptables_block_ip.pdf
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/canada_visit_visa_form.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053d5.bin
48bf22363c3109eb61fdf1478bdb4056ec1ad7fc0a6a44a9aa13b2f7ea5d0033
pdf-font-stream PDF embedded font (sfnt) at offset 0x53D5 4988 bytes
font_01_sfnt_off000064d9.bin
e61aca6afa88d46fc0f38acd1a2517ec27bcab53f0cfa2e26904ecfa39681723
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D9 24784 bytes