Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b8e2dc35fbe07c…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 02:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e4493a7b5e3744fbca2dde02959b83e SHA-1: 4bc42e5637009f00eca86b5460199fa4538daa00 SHA-256: d2b8e2dc35fbe07c6d09f72aacdc0c31ee4c4b0f82f736f89d63835f5c9a3846
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector: https://ttraff.cc/wb?keyword=total%20parenteral%20nutrition%20in%20pediatrics%20pdf. Another heuristic detected a link farm, suggesting an attempt to manipulate search engine results or distribute content widely. The document body, though partially corrupted, contains text related to 'Total parenteral nutrition in pediatrics pdf' and mentions 'wkhtmltopdf', indicating a potential lure to disguise malicious content. The presence of multiple unknown URLs further supports the malicious intent.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wb?keyword=total%20parenteral%20nutrition%20in%20pediatrics%20pdf
    • http://files.cngwritersinkcom.com/uploads/1/3/0/8/130874254/b4b520.pdf
    • http://files.drumartist.net/uploads/1/3/0/7/130775413/2446560.pdf
    • http://files.myfascialhealth.com/uploads/1/3/1/3/131384468/xokot.pdf
    • http://files.revelstokeflorist.ca/uploads/1/3/0/7/130776401/9865f66264d.pdf
    • http://files.andrebretoncycling.com/uploads/1/3/1/3/131379205/813199.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/japakutud.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/58350178494.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45865267400.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/gufexujusekemilikoked.pdf
    • https://cdn.shopify.com/s/files/1/0435/0771/2155/files/adp_paystub.pdf
    • https://cdn.shopify.com/s/files/1/0449/4403/1899/files/ben_10_omniverse_tamil_episode_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/icecream_converter_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/68688120231.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/nitojuzikibekikovamuruvud.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2722/files/powikez.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_off00005daf.bin
bf3f2cb3af7a77d70af4b734f674ef1ff6b00ace5639cc6374397e0b3e16a0c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 4980 bytes
font_01_sfnt_off00006e9f.bin
e585209c540b01858bbc55cd550839d9a819fab986fa953355147a1d734d572a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 10448 bytes
font_02_sfnt_off00009204.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9204 4324 bytes