Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5a71d732cbbd4c…

MALICIOUS

PDF

44.3 KB Created: 2020-08-21 07:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f41cea760a1ae466a0ba21c108be915 SHA-1: b6cac098270014bed7f03b24cdad907ef4207dc2 SHA-256: da5a71d732cbbd4c7d0044bf66433e2ee5cb9354289a30974adc7ba22353e913
140 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=guide+canutec+2016', which is likely intended to lure the user into clicking it. The presence of numerous PDF links, many hosted on Shopify, suggests an attempt to create a link farm for SEO poisoning or to obscure the malicious destination. No scripts were extracted from this sample.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=guide+canutec+2016
    • http://files.ryankbeauty.com/uploads/1/3/0/7/130739239/019c45.pdf
    • http://files.celestecorp.com/uploads/1/3/1/8/131871494/7847019.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/nonujub.pdf
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/winufa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/davixi.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/english_language_teaching_methods_and_approaches.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/sit_report_fire.pdf
    • https://cdn.shopify.com/s/files/1/0437/8833/7313/files/74747120201.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/82523361183.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/bearing_size_pdf_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/3720125006.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/lidajoxenaxepatizoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/kubiwinefuwinupapez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/lebebezalikegeset.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/vodudo.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_off0000710f.bin
1539097f68ae3798e55b116b4d1fe0fd026e1b8f9cac4061debea6bf6c1e9b6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x710F 5136 bytes
font_01_sfnt_off00008296.bin
5ec527336d0a3fe6f96a9fcaf1b1d6c99f8dadce06fde510471684e1a6b9c814
pdf-font-stream PDF embedded font (sfnt) at offset 0x8296 10032 bytes