Malicious PDF — malware analysis report

Static analysis result for SHA-256 40af19c7084ef0bc…

MALICIOUS

PDF

42.9 KB Created: 2020-08-21 01:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b155e4be6cf3ce142fbdbf4773ffae0 SHA-1: f6925a6edacdbb569e3edd63c4d0964b4dd737fd SHA-256: 40af19c7084ef0bcf6649291aa6c3231b953ed11250064722efa7dd65004de32
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=vevo+er+mp4'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being a benign Shopify URL. The presence of a 'download button' heuristic suggests a lure to entice user interaction. The document body itself is heavily obfuscated and contains the malicious redirector URL, reinforcing the malicious intent.

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=vevo+er+mp4
    • http://jenowi.slaterphoto-graphic.com/uploads/1/3/1/6/131606069/2940570.pdf
    • http://files.inspiringeducation.net/uploads/1/3/0/8/130874162/vovujudob_xesema_riwomoraw_lajesix.pdf
    • http://files.makealbertagreatagain.shop/uploads/1/3/0/8/130873826/jimimu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/karonuwoxatufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/google_play_store_apk_for_kindle_fire.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/81353791193.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1970/files/wizard101_sylvia_spitfire.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/15549087284.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7784/files/contaminacion_del_aire_tesis.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/66087346268.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3741/files/african_china_video.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3383/files/oxford_discover_1_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0438/2887/1318/files/dowry_prohibition_amendment_act_1986.pdf
    • https://cdn.shopify.com/s/files/1/0431/6794/0765/files/rokopemejomefuvifojokeko.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f35.bin
5e4a7776b09f2ef7cd3ffa91336b16b585f73926a29ee6ff4dc915e504b16888
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F35 4212 bytes
font_01_sfnt_off00006d78.bin
924334320030bcb5834d596d993c553421547cf8339a0265c91c03c9c300a2c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D78 10428 bytes
font_02_sfnt_off00009127.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9127 4324 bytes