Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12dbb63163a6f71…

MALICIOUS

PDF

41.6 KB Created: 2020-08-04 22:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 001db1ef38e02685f152ef3687b70bd5 SHA-1: d1e69fa14ce74fac16a195ce89a0d6887241509e SHA-256: b12dbb63163a6f71f612376b579812e04a1cfc19eba1d3bc6b9ac41b06c838e7
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including a critical finding of a malicious redirector at 'https://ttraff.ru/pify?keyword=baixar+pdf+creator+em+portugues'. The document body also contains text suggesting a download lure, and the PDF structure indicates a link farm designed to distribute links to various PDF files, many hosted on Shopify. This suggests the primary goal is to redirect users to malicious infrastructure, likely for further exploitation or malware delivery.

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.ru/pify?keyword=baixar+pdf+creator+em+portugues
    • http://files.mrstutsmathclass.com/uploads/1/3/0/9/130968920/fogaro-bubejugu.pdf
    • http://files.pacificcrestcomedy.com/uploads/1/3/1/4/131437157/ramugesenatedig_duparagaru_vavuxamife_lurimeze.pdf
    • http://files.apparelfromhazy.com/uploads/1/3/1/4/131437333/1221815.pdf
    • http://files.kdhodges.com/uploads/1/3/2/7/132740321/5360778.pdf
    • https://cdn.shopify.com/s/files/1/0436/6493/3014/files/40023644138.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3941/files/sexodatadipomurukesut.pdf
    • https://cdn.shopify.com/s/files/1/0441/3951/1960/files/wowugagosojiduwakukun.pdf
    • https://cdn.shopify.com/s/files/1/0436/1424/0931/files/camera_lucida_reflections_on_photography_roland_barthes.pdf
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/zapifenefu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/31001587196.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/97278953210.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/vawolalegozemugamed.pdf
    • https://cdn.shopify.com/s/files/1/0431/9998/7873/files/jobifodigarukavosexutoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/theme_hotel_hooda_math.pdf
    • https://cdn.shopify.com/s/files/1/0440/7368/1061/files/53524048509.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/kexeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/96735465702.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/neladeboforepu.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_off000062b1.bin
6233ff66cae275ab29d2ac3330c55849da98ea0e9bef3cb45678b282425d8006
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 5560 bytes
font_01_sfnt_off00007595.bin
c0cb3239bfe063b5883b832f76c88bbddceea9d38149c90c6adc716bbcd7d4dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7595 11224 bytes