Malicious PDF — malware analysis report

Static analysis result for SHA-256 301b15325137a94b…

MALICIOUS

PDF

45.4 KB Created: 2020-08-05 15:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93383a52082d9228b57507dbe9af0585 SHA-1: fef9379a16dc4fd8d57b52f4bc463d4484f40cc2 SHA-256: 301b15325137a94b3c1d4d68e68037ef78a88baddfeeedf205a4526b4f66c3b9
128 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'ctet answer key december 2020 pdf download' and a visual download button lure, suggesting a social engineering pretext. The PDF also hosts a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, which likely serve to distribute the malicious 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.
  • 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.ru/pify?keyword=ctet+answer+key+december+2020+pdf+download
    • http://files.cleartaxreturns.co.uk/uploads/1/3/0/7/130776590/5291570d117e5.pdf
    • http://files.selfmovementca.com/uploads/1/3/2/6/132683330/bazawadotiromo.pdf
    • http://files.camarillochamber.org/uploads/1/3/1/4/131438899/97139404cfcb.pdf
    • http://files.justinsrun4hope.com/uploads/1/3/0/7/130775506/bameveravosuxekiwed.pdf
    • http://files.sopoochtraining.com/uploads/1/3/2/8/132815961/kawivibugakovuj.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/88678476443.pdf
    • https://cdn.shopify.com/s/files/1/0434/8297/2326/files/tegejokagov.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/muxumokiligizajapite.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/fotapibaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/jazodifegobetolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/informatica_mdm.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/san_jose_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/kevuvalibejoniwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/talisman_dark_souls.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/85431034888.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/nibof.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/dopuvepowag.pdf
    • https://cdn.shopify.com/s/files/1/0428/8164/6758/files/lawawajizuz.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_off00007094.bin
71bb7651c32b2abca662b8cc9ea917dbd8d41f416406c1374d9c69bcd34d9507
pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 5880 bytes
font_01_sfnt_off00008495.bin
18ab370a903765197be9e629e6be88ad48439ab738ac98884063d39366ddbad5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8495 10512 bytes