Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b38d115778b01d1…

MALICIOUS

PDF

42.6 KB Created: 2020-08-21 20:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a78a70a1e3f0faf349966e793f485433 SHA-1: d0640a4ebec09bc94d1b1e849b42b8b6b0cdd759 SHA-256: 1b38d115778b01d18e6fe7497864b85822fc093dc1531b8ecd4f32faf10108a7
136 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or redirection attempt. The document body text, though partially corrupted, includes phrases like 'Ma admission form pune university' and a call-to-action phrase, suggesting a lure to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further stages of an attack.

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ma+admission+form+pune+university
    • http://wolan.kirstenpowell.com/uploads/1/3/1/8/131858530/0ff29708986b6.pdf
    • http://files.colaisteanchraoibhin.com/uploads/1/3/1/4/131452878/f75cf48b.pdf
    • http://files.easel-lab-mondal.com/uploads/1/3/1/3/131380592/xokisenozu.pdf
    • http://fuberesam.schwarzgoldce.org/uploads/1/3/1/0/131070374/54d0043117ae.pdf
    • http://files.texasmlsbroker.com/uploads/1/3/0/9/130969158/05e32b.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/addressing_modes_of_8085.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/basic_english_assessment_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/vewuferozikad.pdf
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/98575024417.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/gogizaru.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/poliwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/aspersores_para_riego_agricola.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/reference_evapotranspiration.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/28571531003.pdf
    • https://cdn.shopify.com/s/files/1/0429/4118/6215/files/bifesomufufidomuguwotepu.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_off00006638.bin
0b17be4b7288cfe07c32216885093836188ac7d73dc6072d4e09b2c6147beb6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6638 5320 bytes
font_01_sfnt_off0000784f.bin
25b1f8f6bee202e46a8dfc1f102105bc88093a9dff2badbe7540982ae3c82c14
pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 10452 bytes