Malicious PDF — malware analysis report

Static analysis result for SHA-256 58a05fa546d8288a…

MALICIOUS

PDF

40.3 KB Created: 2020-08-11 22:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3dcd78046308f68795b71f94c5f3ac1 SHA-1: 7d48e9f0e7d150916f927f51d468fe30aadba6dd SHA-256: 58a05fa546d8288a74b0c9a7709f54b6e109bde9920478a003b420f694f0dfa3
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by the presence of a visual download button lure. The document body, though heavily obfuscated, contains the URL that leads to the redirector. The redirector itself points to a link farm hosted on Shopify, likely to obscure the ultimate destination.

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=1000+basic+english+words+pdf+download
    • http://nidog.lindahubbardart.com/uploads/1/3/0/7/130775075/1783246.pdf
    • http://files.shenandoahvabusiness.com/uploads/1/3/1/4/131454670/4392185.pdf
    • http://files.bookertmusicguild.com/uploads/1/3/1/1/131164236/bubuzizuz_nawobozekez.pdf
    • http://garudu.multinationalministries.com/uploads/1/3/0/8/130874431/tiduse.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/99827231715.pdf
    • https://cdn.shopify.com/s/files/1/0433/9338/4599/files/manevoresorakevigerokiwes.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/ethnography_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/51174248852.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/nisagiritawagebevunurudu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakawefefaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/zerabopiresogozuma.pdf
    • https://cdn.shopify.com/s/files/1/0454/6029/1742/files/angina_de_plaut_vincent.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/xawinakobolotumaragewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/57983401206.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4885/files/xomixokakijakiwonuvi.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_off00004a59.bin
a1f8a822d9b5bb75efb60689365aaab87aef55788d117c7a032961eb50bda5ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A59 5748 bytes
font_01_sfnt_off00005de2.bin
2f5a3bc140e05c331272efde71170376ac7908076f5fcec95a0c21cc4bb75018
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE2 9600 bytes
font_02_sfnt_off00007f05.bin
2fa4f296fe9e38b1bea2264e65e06c45fbbf4edfcb32b68fd436b1108ab95b01
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F05 16096 bytes