Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c2d281ce77e703…

MALICIOUS

PDF

64.6 KB Created: 2020-08-02 15:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 420e1b9d746ddb4ea37100ad9aa566a4 SHA-1: 154c75d03a25ab95c190d899d162af5e843a4118 SHA-256: 87c2d281ce77e70387419380572df7e669b14f09308461b5834dcee64a74e7bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1505.003 Server Software Component: Exploit Kit

The PDF file contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a malicious URL. The document body and heuristics indicate a lure for a "keygen" and explicitly instruct the user to disable security software, which is a strong indicator of malicious intent. The primary malicious URL is https://ttraff.cc/pify?keyword=adobe+lightroom+keygen, which likely serves as a redirector to a final payload.

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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=adobe+lightroom+keygen
    • http://files.airedales4u.com/uploads/1/3/1/3/131398591/kuwigidotiva.pdf
    • http://files.delphieng.com/uploads/1/3/2/6/132695354/4413260.pdf
    • http://files.stclementscambridge.org/uploads/1/3/0/7/130775350/fikixexutadi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6483/3686/files/84607836914.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/planar_handbook_3._5_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/64716503319.pdf
    • https://cdn.shopify.com/s/files/1/0440/8400/2981/files/xulenufafeza.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/oxford_ib_chemistry_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/rupaxubalipuvakomekefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/53941294720.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/71855971397.pdf
    • https://cdn.shopify.com/s/files/1/0437/0700/7127/files/26369226348.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/29723260279.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
stream_006_off0000b334.bin
bbbe7451c74085fa3cf13ddc88f234f245c38e94ad623cf4ccbd55abbe13b7c3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB334 28044 bytes
font_00_sfnt_off00007ade.bin
b6a91664c5e3573d61c7a69d622b8b4111bfa653b015f2704eae3e398475ea51
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADE 4932 bytes
font_01_sfnt_off00008b7f.bin
6d131e89cc96c58eb12f812118364bf5e429cabcaacb63ff586a3985161bf50c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7F 12384 bytes
font_03_sfnt_off0000e4dc.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DC 4324 bytes