Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45b3ce227b38c5f…

MALICIOUS

PDF

49.8 KB Created: 2020-08-02 23:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31e9288daf5059cf9c3b75ae6e650720 SHA-1: fdd55aeedf377eea502c97db6ecbb0e6fb5734e0 SHA-256: e45b3ce227b38c5fd04e5eccebe71a67fce2f3e00547d640c9ba76c120fc9906
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=hubris+and+hamartia'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack pattern.

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=hubris+and+hamartia
    • http://files.mothermoonwellness.com/uploads/1/3/0/9/130969310/lusavolosome.pdf
    • http://files.abundantlivingpsychologicalandcoachingservices.org/uploads/1/3/0/7/130739628/6245397.pdf
    • http://files.pawsitivewellnesscenter.com/uploads/1/3/1/6/131606864/wuduxixom-dolomedofog-mefimixum.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/nebezuxexefumepo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/89609594728.pdf
    • https://cdn.shopify.com/s/files/1/0449/4534/2619/files/php_refresh_page.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/winikidibiloxusedij.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/dodaxik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/18926475577.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4773/files/dunadozapuponukipotimu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/folirelokanafekiwiwonux.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/66334140818.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/pozafesusepolur.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/91710153681.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000761b.bin
990489a1b5a855fe12efa0bb2841391958c387864d196ac4ac163a919149e49b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761B 4788 bytes
font_01_sfnt_off0000860e.bin
e70cbf92095273d4a77368d3fa70543ebe337924f300ea518a29bf2f914a16d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860E 11760 bytes
font_02_sfnt_off0000ac50.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC50 4324 bytes

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