Malicious PDF — malware analysis report

Static analysis result for SHA-256 67313efabc648d0e…

MALICIOUS

PDF

43.1 KB Created: 2020-10-03 14:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3b0daa7919b69d343d99bedcc776dc4 SHA-1: d0c73f3b3141ed484fd40e16e671f30ca105730a SHA-256: 67313efabc648d0eec2217b173d51e7c7504bcedcd59e6b4fcbbb83977336cd8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, identified as a link farm, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

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://gettraff.ru/strik?keyword=asking+the+right+questions+global+edition+pdf
    • http://files.tathrabeachcountryclub.com/uploads/1/3/0/8/130873918/nekerakadazopikasi.pdf
    • http://files.glscentre.com/uploads/1/3/1/3/131379060/bba33f237231.pdf
    • http://buriku.bpecc.us/uploads/1/3/2/6/132682063/38fc93f97868b13.pdf
    • http://files.empyreanresearch.org/uploads/1/3/1/4/131456191/kowisorutif.pdf
    • http://files.roanmountainglass.com/uploads/1/3/0/7/130739081/jifod.pdf
    • http://files.standebiec.com/uploads/1/3/1/3/131383482/6776779.pdf
    • http://vobin.taylormorrismusic.com/uploads/1/3/1/4/131482988/batapugi.pdf
    • http://dokogatos.jgerenstein.com/uploads/1/3/1/1/131163717/xurilofajunizeb_bilaripibu_wutukeveb.pdf
    • http://files.hawkecreations.com/uploads/1/3/1/3/131379748/6603715.pdf
    • https://site-1037096.mozfiles.com/files/1037096/42956829830.pdf
    • https://site-1036965.mozfiles.com/files/1036965/mazukusenomotevanokineg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/83890719811.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/7816258902.pdf
    • https://cdn.shopify.com/s/files/1/0477/5880/3100/files/49939050375.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/5838462218.pdf
    • https://cdn.shopify.com/s/files/1/0477/9841/9615/files/atomic_particles_worksheet_answers.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_off00006a17.bin
851d981d9b3137c2f78628ee73e7db82c92838ec988eecb0b2203cc80009a472
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A17 5624 bytes
font_01_sfnt_off00007d24.bin
11997842d9b775ace104ea70326f03565b2f5a50806e63fb870c4a246c26df92
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D24 10160 bytes