Malicious PDF — malware analysis report

Static analysis result for SHA-256 640cec7e66b595a9…

MALICIOUS

PDF

54.4 KB Created: 2020-08-25 09:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ee8962b8d3a33bcc9297e11c77b5fba SHA-1: eea6074a446f238c2fae1bf7a6a61ebdb0b4316a SHA-256: 640cec7e66b595a90b02259634943f2cb8cca7e05834cce1c34cdae988df2e60
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body and heuristics indicate a lure related to an 'M8s android box update', suggesting a phishing or scam attempt. The presence of numerous embedded links, many pointing to Shopify, suggests a link farm designed to obscure the ultimate destination and potentially spread malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=m8s+android+box+update+2019
    • http://xugazo.rctutor.org/uploads/1/3/1/4/131454207/degiju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/23568798061.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/letef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/kifowamixerada.pdf
    • https://cdn.shopify.com/s/files/1/0438/3234/4736/files/leetcode_word_break.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/puwoporupurinufosilis.pdf
    • https://cdn.shopify.com/s/files/1/0466/5232/6053/files/pc_benchmark_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/vujudadiwamati.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/dirowakewotuse.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/kirapubasupiz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007659.bin
5e60a4a5ef11bc40477ed43fe12e9cb75654b79d9ee918b2027ccbcfceb2d783		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7659 5692 bytes
font_01_sfnt_off000089b7.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B7 1800 bytes
font_02_sfnt_off00009245.bin
6c7c11321ada4674826f7a5a7328fb3a50f3c5de8d91d1bf457f9ca2c47056ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9245 13848 bytes
font_03_sfnt_off0000be53.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE53 4324 bytes

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