Malicious PDF — malware analysis report

Static analysis result for SHA-256 d764b5a133219562…

MALICIOUS

PDF

44.2 KB Created: 2020-08-15 04:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e038faf6011d553ab7f235c84894f11 SHA-1: cf44dca461129e8601a8dadf1093ebc8e37aac68 SHA-256: d764b5a133219562ff760eecfbbf127fd5a27b96b510f7c5b3f7e571bce2f29a
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links redirects to `https://ttraff.com/pify?keyword=avast+antivirus+apk+android`, which is flagged as malicious redirector infrastructure. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution, by impersonating a search result for legitimate software.

Heuristics 3

  • 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.
  • 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=avast+antivirus+apk+android
    • http://files.brunnerfarm.net/uploads/1/3/2/6/132681342/107bf8510e4a.pdf
    • http://files.carolinamountainreefs.com/uploads/1/3/1/3/131380308/kikupazajoximoje.pdf
    • http://files.carawaydeafyouth.com/uploads/1/3/0/7/130775953/9433189.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/39381727123.pdf
    • https://cdn.shopify.com/s/files/1/0435/1164/4324/files/windows_shutdown_noise.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/sufepiwopopek.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/bekijalodila.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/basic_python_programming_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/42678531375.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/jinofufanokisutovixejizuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/dexadovixigabivexus.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/arbitration_law_book.pdf
    • https://cdn.shopify.com/s/files/1/0445/8224/0420/files/lic_jeevan_tarun_plan_834.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/74464614412.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_off00005945.bin
e6a09581cfca82daa75d00e70660f2060461de090067d5dcdf4f275defb0e833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5945 5032 bytes
font_01_sfnt_off00006a76.bin
f106d7715228b5d473c3d95fb78f4a590b18c4ef73af9fb2bf2f5b1817f039fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A76 10532 bytes
font_02_sfnt_off00008e89.bin
2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E89 16144 bytes

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