Malicious PDF — malware analysis report

Static analysis result for SHA-256 485528c0e5d8cae3…

MALICIOUS

PDF

51.3 KB Created: 2020-08-20 14:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 545c61ec92e88cb6f7dd86fc5a0cb515 SHA-1: a4c63e18b646c05b8d9002c1cf92edef3cd8786f SHA-256: 485528c0e5d8cae3db29f2150df64fdfdac8a8098129be8156a69054194151ea
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a search query for 'biology book class 9 pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The presence of a visual download button lure further supports the malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.
  • 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.com/pify?keyword=biology+book+class+9+pdf
    • http://vutenu.ilketshallstandrew.com/uploads/1/3/2/8/132814935/897872.pdf
    • http://files.mariedilorenzo.com/uploads/1/3/0/7/130776775/17f41ba.pdf
    • http://sojezuw.whiteoakbenddairygoats.com/uploads/1/3/1/8/131871871/f921c45e56caa2e.pdf
    • http://files.mortgageinsuranceontario.ca/uploads/1/3/1/4/131408970/ea3395081748.pdf
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/jesaviwoninitedanozago.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/sijakilujezijizavemesami.pdf
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/75542770978.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/jvc_remote_control.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/48713426341.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/fishing_report_on_bull_shoals_lake.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/betagro_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6262/files/tabela_amperagem_fios_eletricos.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006166.bin
7d6c9bbccb27be9919ac58853ecf13be360f5b90516e4d8238bccd227f86d151
pdf-font-stream PDF embedded font (sfnt) at offset 0x6166 5220 bytes
font_01_sfnt_off00007326.bin
549e2bcfa9dcb0c1b5821b44936443fe73f57bc24265ad32854ea0ce18fa9509
pdf-font-stream PDF embedded font (sfnt) at offset 0x7326 10276 bytes
font_02_sfnt_off00009688.bin
6517e369393d16c7899f36ca6914edefe2b8b294d4a609ea03bc814193fec574
pdf-font-stream PDF embedded font (sfnt) at offset 0x9688 17980 bytes
font_03_sfnt_off0000b227.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB227 4324 bytes