Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d3c86263015540…

MALICIOUS

PDF

39.8 KB Created: 2020-08-12 19:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daace4c7f8a597f5230d675531ac95cc SHA-1: 0d63bfe5909d2096e35f17a7cedf7d3c6dfacb6e SHA-256: 59d3c862630155401dc0b33421b34615f845ec378fe339703b671354e85f4eae
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to converting PDF to Word and includes the malicious URL, suggesting a social engineering lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to benign Shopify URLs, likely to mask the malicious redirector. The SE_DOWNLOAD_BUTTON heuristic further supports the lure aspect.

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=convertir+un+pdf+a+word+trackid+sp+006
    • http://files.rachelsweetcreations.com/uploads/1/3/0/9/130969176/d1012eb1e17.pdf
    • http://files.robinhowardwrites.com/uploads/1/3/2/6/132681392/mikin_lovexulimuronas_xizunavi.pdf
    • http://files.johnwbaumgartner.com/uploads/1/3/0/8/130874298/piwerelefafor.pdf
    • http://gelef.shsbusinessclass.com/uploads/1/3/1/4/131407995/lamiwekoxetepiki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1970/files/motivation_letter_for_bursary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95181885481.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/55743138371.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/occupational_health_and_safety_vtu_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9874/files/ias_mathematics_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.pdf
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/mebuxevewidajaxewevam.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/81885372208.pdf
    • https://cdn.shopify.com/s/files/1/0429/6517/2387/files/84348647454.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/7805676996.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/monexufixilukokizifepelov.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/suzuki_access_125_specifications.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_off00004f4a.bin
ae65d138859be5024df0b69fa9a0878c20286c2c5d291d3c8515afe1b6fd2b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4A 5532 bytes
font_01_sfnt_off00006244.bin
e21312cf0da0fcefd866f3af111d3f822a3749a9ff81dbfa3fca3d396fb266a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6244 9920 bytes
font_02_sfnt_off00008443.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8443 4324 bytes

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