Malicious PDF — malware analysis report

Static analysis result for SHA-256 02069a4fde2768d8…

MALICIOUS

PDF

40.4 KB Created: 2020-08-23 01:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15a576ec2c144d4674adee6c21ae78c6 SHA-1: db4ea9fd7c5ded75e6e5140d73ca45306840c3f0 SHA-256: 02069a4fde2768d8e4e40010b154e0d14a5a15a68280fe680660c859dfafa803
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to drive traffic to malicious sites.

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.cc/pify?keyword=eyebeam+calling+software
    • http://files.powerpointers.info/uploads/1/3/2/6/132681513/4123103.pdf
    • http://files.perseveranceandpotatoes.com/uploads/1/3/0/7/130776141/nanugedogalaxetepopo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/levufimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/62475196311.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/padi_rescue_diver_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/76439447312.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/birthday_invitation_word_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/xesokomapebiwobozom.pdf
    • https://cdn.shopify.com/s/files/1/0434/1134/1479/files/14945369384.pdf
    • https://cdn.shopify.com/s/files/1/0438/4201/1286/files/witamemokenosegemewe.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_off00005e54.bin
bd8580e86aa08211f4effd4514c1d6afbeeb762a6bae1bd3f53b33a4863bab74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 5492 bytes
font_01_sfnt_off0000710d.bin
68b278a1fe4bdaf28b772a139967e562ffef42110b9f8022cffbcd5301e83eb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 10772 bytes

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