Malicious PDF — malware analysis report

Static analysis result for SHA-256 01086ebd0d2aa6aa…

MALICIOUS

PDF

45.6 KB Created: 2020-08-17 17:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 348a6b5baa92e3f55e34fa8309678d82 SHA-1: 36b833e4342cae689009584e98e172198f47cfed SHA-256: 01086ebd0d2aa6aa908419746916c02ad3866e0fdc57b08aa0677c2079fac039
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL and other URLs that appear to be part of a link farm, suggesting 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.cc/pify?keyword=how+to+copy+conditional+formatting+across+sheets
    • http://files.bigsisterschicago.org/uploads/1/3/1/4/131482991/9d243e39876f.pdf
    • http://zozolapi.gotruckgo.ca/uploads/1/3/0/7/130776436/475840.pdf
    • http://files.sarahpearman.co.uk/uploads/1/3/1/3/131398182/79decec9aa4a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/xebunural.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/85212552138.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5352/files/popesowinojodiferogav.pdf
    • https://cdn.shopify.com/s/files/1/0446/5029/9555/files/minimize_size_mac.pdf
    • https://cdn.shopify.com/s/files/1/0439/7996/4574/files/demaregi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5447/files/gozipapasawu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6671/9385/files/tirolut.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/aspergillus_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/pavonimumujipuzepisoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/50256275932.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/vesipotajewonejan.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_off00007187.bin
f70a304b63aba999a3538eb8aa09a925bcbe86c2750123d4c94415c15d873bc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7187 5724 bytes
font_01_sfnt_off000084e5.bin
1a085ce32b5754bfa9e39efba0244984dc31052fe145073ebc501b717d1b1261
pdf-font-stream PDF embedded font (sfnt) at offset 0x84E5 10632 bytes