Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22922e952b2ffb1…

MALICIOUS

PDF

55.1 KB Created: 2020-08-17 10:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10e4843db463e7f9ed1fa907c148ba5c SHA-1: 829ef6665719c372db32f3b46bf23e30cc661b5b SHA-256: c22922e952b2ffb15cc4cfe43f9694475395210af811e9ef8555493282ac24cb
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to visa applications, which is a common phishing tactic. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, likely for SEO manipulation to increase visibility of malicious content. No scripts were extracted from this sample.

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=australia+tourist+visa+application+form+1419
    • http://files.weldnbraze.com/uploads/1/3/2/3/132302963/7300554.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/biology_class_10_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/19362167972.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/45444555489.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7121/files/absolute_value_inequalities_activity.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9829/files/50011811977.pdf
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/centrifuge_types.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/pdf_converter_to_word_editable_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/wugawurodubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/complex_sentence_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/41869645402.pdf
    • https://cdn.shopify.com/s/files/1/0432/7456/7833/files/sinogeto.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_off00008c99.bin
e68d8160a464fcbeab1278deb7ba5065178b4ef73565f6791e90900fd63d51f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C99 5272 bytes
font_01_sfnt_off00009e6f.bin
b92dace2c18cf58371404d66469a61926249ec3f149247303a76922fcc5222d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E6F 10248 bytes
font_02_sfnt_off0000c141.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC141 4324 bytes