Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81c90dca116da9b…

MALICIOUS

PDF

39.2 KB Created: 2020-08-28 14:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f84343e0595a8eb35f73a250f3a61c5f SHA-1: ff169112e8dc06955b1c7eb8e33a57e942387eb4 SHA-256: e81c90dca116da9bc670993799f67e5d81c340bddd2849f8fd5d31762871dbd2
152 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, which is designed to lead users to potentially harmful content. The document body, though heavily obfuscated, contains text related to 'Salomon shoes elios 2 gtx' and includes the malicious URL, suggesting a lure for users interested in purchasing these items. The presence of numerous other PDF links, many pointing to suspicious domains, further supports the malicious intent.

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.link/pify?keyword=salomon+shoes+elios+2+gtx
    • http://xawafu.callaoc8.com/uploads/1/3/1/3/131380598/1835772.pdf
    • http://files.obhifl.com/uploads/1/3/1/4/131438019/pukagoko.pdf
    • http://files.cambridgevalleyfarmersmarket.com/uploads/1/3/1/1/131163540/8725220.pdf
    • http://mizatak.griswoldart.org/uploads/1/3/1/0/131071164/dosemewunor-pofoga-julaxur.pdf
    • http://xebosomo.bapzetapi.org/uploads/1/3/0/7/130776791/7840297.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/48758765137.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/flamenco_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/1749531803.pdf
    • https://cdn.shopify.com/s/files/1/0438/3087/0173/files/50577275120.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/rofulukisin.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/68861481836.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/san_antonio_tx_bit_th_lin_k_cho.pdf
    • https://cdn.shopify.com/s/files/1/0449/3551/2232/files/begrung_und_abschied.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/65540713752.pdf
    • https://cdn.shopify.com/s/files/1/0463/1756/8157/files/66742046231.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_off00004e9b.bin
38b35fa49ff758994483a744614b38f18b244ba01d5bcb10724fe6f0b530a668
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9B 5308 bytes
font_01_sfnt_off00006082.bin
15dfc1aa4e2d1b8d61a1504456bccbf6e3c0a7e33db291b841407f8e04755c28
pdf-font-stream PDF embedded font (sfnt) at offset 0x6082 15780 bytes