Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d43e11c7ad2a717…

MALICIOUS

PDF

46.8 KB Created: 2020-07-23 12:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c376350c4839145d3b6a26fa88c5aacc SHA-1: ce9aa078ddefaa5498186f414ff595386af35878 SHA-256: 5d43e11c7ad2a71783268dadc4d2775fbdcc78281e5178edb178140685b7989b
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 of which are part of a link farm designed to appear as legitimate content, such as a weather report. One of the primary links redirects to a known malicious domain, indicating a phishing or redirection attempt. The ML classifier also strongly indicated 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=ionian+sea+weather+report
    • http://files.cassandraliuzzo.com/uploads/1/3/1/8/131856125/ralonaxigawiro.pdf
    • http://files.truthfulart.com/uploads/1/3/1/4/131438099/wetopadetozabijotul.pdf
    • http://files.alexandrathurston.com/uploads/1/3/0/8/130814914/lawiwi.pdf
    • http://files.locksmithpros-wa.com/uploads/1/3/2/7/132740285/2e8ea.pdf
    • http://files.katoutofbag.com/uploads/1/3/0/7/130738794/bee1e4bed8753.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2886/3397/files/razabidato.pdf
    • https://cdn.shopify.com/s/files/1/0427/5837/3542/files/75642518485.pdf
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/64813795675.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7032/files/kotodubezevepoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/17645145260.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/gegirewowudupotepo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/53699211171.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/putediduxonatalixad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/97329917035.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/28570867579.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/veziduzumimopusiveti.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_off00007374.bin
c2911c03046fd87db25d7c9940432497ef7cc2ea9122fe02602289ac95bd8f42
pdf-font-stream PDF embedded font (sfnt) at offset 0x7374 4692 bytes
font_01_sfnt_off00008360.bin
925027a685df98a68a0624d8ae0e80a1ee2b129d1467cef089e0b05c5eec7f45
pdf-font-stream PDF embedded font (sfnt) at offset 0x8360 13032 bytes