Malicious PDF — malware analysis report

Static analysis result for SHA-256 1434a89fddb1d23f…

MALICIOUS

PDF

45.5 KB Created: 2020-07-30 12:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6daee22c9997cd55020054355056c2 SHA-1: 080c024e5b5c3d474cb708f9a591a31341b29b56 SHA-256: 1434a89fddb1d23f624cda5f37abad3e4bd017c56913a901c55bd5d974892c35
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service known to host malicious content. The document body is heavily obfuscated and appears to be a lure related to solar energy, likely intended to trick users into clicking the malicious links. 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.ru/pify?keyword=disadvantages+of+solar+energy+pdf
    • http://files.marineservicecorps.net/uploads/1/3/0/7/130740586/futonagi.pdf
    • http://files.ri4d.com/uploads/1/3/1/4/131406841/d0ac222d397d139.pdf
    • http://files.all2run.com/uploads/1/3/0/7/130739015/wajabit-nowoxazepodu-jazimifusi.pdf
    • http://files.primarytackle.com/uploads/1/3/0/7/130740053/lufanizowag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/41070351827.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/nemisikawek.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/23250083573.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/57493164484.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/mepukofujedepilab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/kurikuzoruw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/lakofidixonofup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/xorubogifeselosatotesag.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/rezunevizefudebexojeboj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3516/files/widubunugoxejawigew.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_off00007456.bin
95111ce869b0754bd2b593765b547ee8f6c6286e532da76363a1078e31ba4c5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7456 5160 bytes
font_01_sfnt_off000085f8.bin
1bc52cd8ef1f2da2bbb20de3346a6eaeb6a218e2e58880f0d8c07756d5b7f660
pdf-font-stream PDF embedded font (sfnt) at offset 0x85F8 10156 bytes