Malicious PDF — malware analysis report

Static analysis result for SHA-256 7106f4c4fdc75c8d…

MALICIOUS

PDF

48.8 KB Created: 2020-08-05 08:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 044b773541899fe250aa9d2907551df0 SHA-1: 6bd036088d6f3989578a47ed9e82ae2c194824f3 SHA-256: 7106f4c4fdc75c8d5b6946b34f2c427062047dfb80906e272f48b6ea09282596
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one pointing to a known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, contains references to the same malicious URL and other URLs hosted on Shopify and custom domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier also 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=robotic+process+automation+seminar+pdf
    • http://files.fetzerscake.com/uploads/1/3/1/4/131455636/dunoko-matotekametexat-kavawepe-mewiwo.pdf
    • http://sulenokiw.walkingthroughtheverses.com/uploads/1/3/2/7/132710797/rimuta_remabevubifuja_pemovobel_vawelixer.pdf
    • http://files.theessendonhotel.com.au/uploads/1/3/1/1/131163774/c75c4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/15489324552.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/97972040747.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/pulefisimarum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/fupukugovaniravija.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/wuvale.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/zuxotanutetadis.pdf
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/loxajoguloxabim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/lista_de_antibioticos_de_amplio_espectro.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/dmard_drugs_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/18459640610.pdf
    • https://cdn.shopify.com/s/files/1/0437/9534/9661/files/vlookup_function_in_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/xepefogamerakewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7266/files/30c_to_fahrenheit.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_off0000804e.bin
78c75a159d76a42d3615a97f395433620846c0b4a0012260210cfa6425d7ebbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804E 5416 bytes
font_01_sfnt_off0000929d.bin
439dba5831ebf0a2797f34d346d8fa22e0cd81d9a686aa99070e60ea0587f9c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x929D 10452 bytes

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