Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfc4672288fe32f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-04 17:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76aeacf64a0921115abb37b1d460d811 SHA-1: db6f3329784029e09d6cc2647cd0375b99f52c75 SHA-256: 2dfc4672288fe32f9736dcdaaab5f53f80032f8c83d6496a96ee43bf7aad9462
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.com/pify. The document body, though heavily obfuscated, contains the same redirector URL and a lure related to "arithmetic math questions and answers pdf", suggesting a social engineering attempt to drive traffic to malicious sites.

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.com/pify?keyword=arithmetic+math+questions+and+answers+pdf
    • http://files.the-svg.net/uploads/1/3/0/7/130738725/aee858b3a224933.pdf
    • http://files.brewstockonlinestore.com/uploads/1/3/1/3/131380343/989b7fc.pdf
    • http://files.kristinamaus.com/uploads/1/3/2/7/132712333/5439992.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/mowaxejepevipupesabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/tejipebebugejuka.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/jegijozojabagoru.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/kidepasapi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/fufibujaxipagav.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/piwupokumimupuriramelaxef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/rumobifijekidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/baxilavulixezumazede.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/50796967735.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/safoxelidekexuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/penamekawuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/26061411140.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/rufepuxekelunexajamagedan.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/renowo.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_off000074e2.bin
62cdff63b61ffa7658e738bfae8ed68e75ecef5d6a3eb532a2694898f8ea3dd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E2 5568 bytes
font_01_sfnt_off000087ba.bin
aa4fab984eb6a13623c4c06d9d783028f62a6b16d676d1053ddf12567adaf77e
pdf-font-stream PDF embedded font (sfnt) at offset 0x87BA 15236 bytes