Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fcb88fe920ef86…

MALICIOUS

PDF

32.8 KB Created: 2020-09-21 17:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9de73c15dde9bd465a3f136d442aa1b5 SHA-1: db6a99b7b47a78bcb0b120de7c7fa846ce0670a7 SHA-256: 10fcb88fe920ef86e1b99df9eb3481a528a265b0f3fdf6bc1160ce20bcb3a80c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One prominent link, 'https://ttraff.me/wix?keyword=samsung+bp70a+battery+price+in+bangladesh', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs and appears to be a lure for product price information, which is a common phishing pretext. The ML classifier strongly indicates 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.me/wix?keyword=samsung+bp70a+battery+price+in+bangladesh
    • http://janoxezo.mmstxregistration.com/uploads/1/3/1/3/131380429/bfb98.pdf
    • http://pikele.lowvisionnd.com/uploads/1/3/0/7/130775987/teverevopix-ritikurili-kexipofivuke-tixezuwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/vokurobalikixef.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1163/files/862097887.pdf
    • https://cdn.shopify.com/s/files/1/0484/9772/1505/files/nulaxagedafasodiropoteva.pdf
    • https://cdn.shopify.com/s/files/1/0433/3142/0319/files/96069947791.pdf
    • https://cdn.shopify.com/s/files/1/0432/0008/6180/files/72015262148.pdf
    • https://cdn.shopify.com/s/files/1/0482/8843/2283/files/xorisakigevox.pdf
    • https://cdn.shopify.com/s/files/1/0435/6685/8408/files/55563423777.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/17661424666.pdf
    • https://cdn.shopify.com/s/files/1/0435/0106/0262/files/egyptian_arabic.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_off0000404b.bin
130c525d5831e296b4c18e3c158def1a5e92a707a2d3794b29d7ce536785288b
pdf-font-stream PDF embedded font (sfnt) at offset 0x404B 6056 bytes
font_01_sfnt_off000054c4.bin
723b784e98caaafd603b8798fb74c045816f59a0ad8de3fa31906732b31aabbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x54C4 10004 bytes