Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a83f5f2a796534…

MALICIOUS

PDF

43.3 KB Created: 2020-08-12 04:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76a7a5fec4ebd054740e1e9417bbbf79 SHA-1: 4a9633fbf0b66c0cf278f9f6ba1419bae5774cf0 SHA-256: f9a83f5f2a796534c0d6ba2c4c33584357a2b839b23ebda0496018ec75f5439d
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The PDF also contains a link farm heuristic, suggesting an attempt to manipulate search engine results. The presence of a 'download button' lure further supports a phishing or malicious download attempt. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=sap+businessobjects+business+intelligence+suite+pdf
    • http://files.monitorseis.net/uploads/1/3/1/4/131406437/sesanet-kulodujubiw-kirabev-pokameb.pdf
    • http://files.bristleridgellewellins.com/uploads/1/3/1/4/131407315/geguwos.pdf
    • http://files.colliquecuffs.net/uploads/1/3/1/4/131483138/9278445.pdf
    • http://mujemoseg.tomhelp.us/uploads/1/3/1/4/131407440/3594047.pdf
    • http://mitifatel.pamelaharrisonpoet.com/uploads/1/3/1/0/131071164/8317983.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/bilimut.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/35934516637.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/95187812450.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/21847746700.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1774/files/verodul.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/geforce_installation_failed.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/31728869952.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/wabikovawanuromojax.pdf
    • https://cdn.shopify.com/s/files/1/0432/3432/8735/files/epme_e4_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/new_functional_training_for_sports_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/2819896830.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/23519629287.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006804.bin
ba8c864be6d9377a08d4638607f34402f34e94b174b0d669c1740debf1728a6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6804 5548 bytes
font_01_sfnt_off00007af6.bin
f78e0295edfd466142e933412ec8de0f832045e9d976795df24668f5f77ff81d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF6 10760 bytes