Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3999c71a5590e5a…

MALICIOUS

PDF

46.2 KB Created: 2020-08-25 14:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c8c35bd7c536b1a3f97932a87c9048e SHA-1: edb5d0734be9305c9cb0636599250951175d2287 SHA-256: f3999c71a5590e5aa67fa04505c424da536b94aec9c315cadebabf07d249f50d
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.cc/pify?keyword=answer+plus+reviews', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious infrastructure, potentially for further exploitation or phishing. No scripts were extracted from this sample.

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.cc/pify?keyword=answer+plus+reviews
    • http://files.authorizedealers.com/uploads/1/3/1/3/131383480/lujolitusade.pdf
    • http://files.loblakers2020.com/uploads/1/3/1/4/131438245/nejitiva-wegaw-bagowitop.pdf
    • http://files.phsboosters.org/uploads/1/3/1/4/131438180/d894aa6088690.pdf
    • https://cdn.shopify.com/s/files/1/0431/8209/6541/files/accuweather_winston-_salem_nc.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9453/1484/files/11766628845.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/zoworetosaregunogawawa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/97260295476.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/29132939764.pdf
    • https://cdn.shopify.com/s/files/1/0435/6338/4991/files/segurana_e_auditoria_em_sistemas_de_informao_lyra.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/zususika.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/22476220345.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/11698845720.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/90314350867.pdf
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/best_open_source_reader_windows_10.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_off00006a83.bin
df847270fec102397313d996a3cda8e1d14756bf372b7f587a9f5c1784f81811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A83 4436 bytes
font_01_sfnt_off0000799b.bin
15d687e9a0639726065a936ef7602246ae9f1703d6ee2e1a2188144bd91de5d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799B 10828 bytes
font_02_sfnt_off00009dd7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD7 4324 bytes

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