Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb89125db4673ab…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 12:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c796ea661122f3f0497f7feedefc98a SHA-1: 6276d6626c67dc24d1bff42b677fafc883aeefef SHA-256: 1fb89125db4673ab5fd45497664be0b33afd294ed4552d350ef452fb9b9fec1f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous links pointing to external PDFs, many hosted on Shopify. The embedded document body text, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing.

Heuristics 3

  • 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.
  • 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=heidelberg+cement+bangladesh+limited+annual+report
    • http://files.poteetchoir.com/uploads/1/3/1/3/131381519/9bfea46537a.pdf
    • http://gafok.falconandhawke.com/uploads/1/3/0/8/130814328/nudamotifewi.pdf
    • http://files.dj-dogtraining.co.uk/uploads/1/3/1/4/131407281/5d8d7311f.pdf
    • http://files.mbagolf.org/uploads/1/3/2/6/132681164/fizifiditumibe-gerin-bolijatejovefo-bawuzikimaxamiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/tamudixajibeza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8311/files/stadtplan_basel_altstadt.pdf
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/buwegufab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/puzawujiriwote.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2145/files/43346559316.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/fokolijozuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/bull_float_harbor_freight.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0999/files/jirijuxewugajugu.pdf
    • https://cdn.shopify.com/s/files/1/0450/4656/2966/files/maternity_leave_letter_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/mabuzejijag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/bimusosopexipugugin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/23844091002.pdf
    • https://cdn.shopify.com/s/files/1/0433/4243/0362/files/rmit_university_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/13467710671.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_off00005344.bin
9e824ea1aee54d9a3b6f7d24d9ce06645165a094634be4398ae0974bdb38ba74
pdf-font-stream PDF embedded font (sfnt) at offset 0x5344 5472 bytes
font_01_sfnt_off00006593.bin
383068996c2ca9da67556bf0ca90b8c3035372cffc09af7f75b6381da1989935
pdf-font-stream PDF embedded font (sfnt) at offset 0x6593 10096 bytes
font_02_sfnt_off00008800.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8800 4324 bytes