Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb851b2e04b9df8f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-26 01:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acdabb00df53e560c5f36366cd880f3b SHA-1: 8e55b4ee922638dda97ffee7398cf801d92427b5 SHA-256: eb851b2e04b9df8f945d3184456267272f30fafc3f0e6b4eebc6409f93a2efca
128 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure. The document body, though partially corrupted, contains text related to 'third grade grammar worksheets free printable' and the malicious redirector URL, suggesting a lure to disguise the malicious intent. The presence of a visual download button further supports a deceptive workflow.

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.link/pify?keyword=third+grade+grammar+worksheets+free+printable
    • http://lowid.jenniferinafrica.com/uploads/1/3/2/7/132740978/refalawukul_gowanederi_muvab_kexip.pdf
    • http://josad.avisfordparkgolfclub.com/uploads/1/3/1/6/131606457/wafugirer_damikakixope_pezojorutino.pdf
    • http://files.advancedurbanmarginality.com/uploads/1/3/1/3/131383586/7515916.pdf
    • http://dadasezim.nowwwriters.ca/uploads/1/3/1/1/131164278/8531942.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/ganawodelamodebo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/tmsc_dominos_com_sign.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/bujajomifawekivegu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5340/8675/files/zelodezowuwujug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/valisefevirakezabosito.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/latorajumata.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/35725974326.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/64624864753.pdf
    • https://cdn.shopify.com/s/files/1/0431/0787/7017/files/asking_for_help_social_story.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/83590155693.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_off00005fd1.bin
9faf7a7eaf2d3be62b12680e4a96b969aaa3d579983c84d62d77d64a39ccf94d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 5700 bytes
font_01_sfnt_off00007327.bin
cb75ad5d02e109d0d10e79b2cf3a9db7726704e708b06276adc8f53a71077689
pdf-font-stream PDF embedded font (sfnt) at offset 0x7327 11604 bytes