Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd139c683492a8fb…

MALICIOUS

PDF

34.2 KB Created: 2020-08-01 08:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2453ee4d9d6e9aeabcab305092e0dfe SHA-1: 9068632dbb0264135b65abf1d91661563653674c SHA-256: cd139c683492a8fbdabf967c9719742fd96fb7392b3e379502eca991eac744a1
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the text 'Da form 2062 fillable pdf' and the malicious URL, suggesting the lure is to trick the user into downloading a form. The presence of numerous links to PDFs hosted on Shopify, some of which are benign, may be an attempt to blend malicious links with legitimate-looking ones.

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=da+form+2062+fillable+pdf
    • http://files.fusionglutenfree.com/uploads/1/3/1/0/131069808/3930469.pdf
    • http://files.jessicahockett.com/uploads/1/3/0/7/130776381/3f3b9cf6.pdf
    • http://files.coloredessentials.com/uploads/1/3/1/1/131163533/nimederukufixa.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/25396652756.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/44419959326.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/upside_down_question_mark_alt_code.pdf
    • https://cdn.shopify.com/s/files/1/0440/0663/7726/files/63862377297.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/60421074694.pdf
    • https://cdn.shopify.com/s/files/1/0434/5364/4966/files/zokunixitagupok.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/19221921492.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/66209149102.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/wejotofusi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/japji_sahib_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/tofejijuvuzewefatokagibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/88378628151.pdf
    • https://cdn.shopify.com/s/files/1/0436/3101/8142/files/keurig_k3000se_manual.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_off000046a0.bin
9259610986465e679fd41607518ca9c7a0625ca87f80011c40a2485ff32792a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x46A0 5576 bytes
font_01_sfnt_off0000597a.bin
ea360942771c45ff60f138137d4107a8d95042a3e1bb11384bfd14437e5becdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x597A 10084 bytes