Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31bddac40726545…

MALICIOUS

PDF

108.6 KB Created: 2020-08-21 21:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fe9511206f8aecce22861c95a729918 SHA-1: 6fb3e4acd586d278b0981af3b723bb7424e673c1 SHA-256: e31bddac407265451efd8f85fe106e8260b15d2a3a20f56ffc64a05377f27dc5
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'complete neuro exam template'. The primary malicious IOC is the redirector URL, which is likely used to host further malicious content or phishing pages. The presence of numerous links, many pointing to Shopify, suggests an attempt to obscure the malicious destination and potentially leverage benign domains for initial distribution.

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=complete+neuro+exam+template
    • http://files.eponaequestriandesign.com/uploads/1/3/2/6/132696174/gabujitad.pdf
    • http://zexar.derechinstitute.com/uploads/1/3/0/7/130738847/jafevi_dazewur.pdf
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/50852648406.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/22800326868.pdf
    • https://cdn.shopify.com/s/files/1/0437/0009/3083/files/chrome_version_76_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/justin_bieber_sorry_free_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/alpine_mini_split.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/kosiromelalajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/norovirus_outbreak_management_and_disease_prevention_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/71006567366.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/77207376851.pdf
    • https://cdn.shopify.com/s/files/1/0428/9226/3583/files/12730061653.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/ssc_hall_ticket_2019_telangana.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000171c3.bin
6df97b93b7fefbe20cad66bb728c1d7336a8a8eb5773b42b161686f2c492b790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171C3 4760 bytes
font_01_sfnt_off000181d7.bin
011230dff75307a4ab3449d544ff0f1491fe48a914e38419bda74d7585fa04d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x181D7 10376 bytes

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