Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3316ba72d56bc08…

MALICIOUS

PDF

46.8 KB Created: 2020-08-12 08:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21f5839207d2c884f827f570cac079d9 SHA-1: c4fe2e2c71d88158fe1aebab3b52d05c6c7ba66c SHA-256: a3316ba72d56bc08ceee9042af810ef9eeeeeca895b9b406dc5a3e48ff27fcdd
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous links to external resources, masquerading as legitimate documents. One of the primary links, 'https://ttraff.ru/pify?keyword=causative+have+and+get+exercises+pdf+with+answers', is identified as a malicious redirector. The document's content and structure strongly suggest a lure for credential harvesting, specifically targeting MFA or one-time codes, as indicated by the 'SE_MFA_LURE' heuristic. The presence of a large number of PDF links also points to a link farm strategy, likely to improve SEO for malicious content.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=causative+have+and+get+exercises+pdf+with+answers
    • http://files.eugeniojedimartinez.com/uploads/1/3/0/8/130873738/gidalofaz.pdf
    • http://zokete.vi-vi.org/uploads/1/3/0/8/130814328/a95f82b5291.pdf
    • http://dosatum.janetmariesola.com/uploads/1/3/1/1/131164243/rabeja.pdf
    • http://files.combatveteranswithptsd.org/uploads/1/3/1/6/131606431/panixoj-gajiponutojemo.pdf
    • http://rusitun.shaeleebakkerprofessionalpresentation.com/uploads/1/3/0/7/130775413/gewevedebudowop.pdf
    • https://cdn.shopify.com/s/files/1/0444/0604/6886/files/text_2_speech.pdf
    • https://cdn.shopify.com/s/files/1/0431/2095/1445/files/rejeveporokebesefip.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/xabib.pdf
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/stevens_320_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/87575984005.pdf
    • https://cdn.shopify.com/s/files/1/0429/6622/0956/files/85249617670.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/39083778294.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/ali_baba_and_the_forty_thieves_short_story.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/87748514175.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/wulevijumiwawusabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/bls_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/59367271517.pdf
    • https://cdn.shopify.com/s/files/1/0433/7827/8550/files/mifazarisawotarenezawev.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_off000078a1.bin
8327693e83eef6550364b9a22ff40fa00a527ed24e719a233c1a3d6a9ef6831f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A1 5508 bytes
font_01_sfnt_off00008b70.bin
01d9b44ca7262c09afe851824c6e7cb249870b05e654a5066e9b626ddc4a2668		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 10148 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.