Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14ff8dcc806c1a1…

MALICIOUS

PDF

43.1 KB Created: 2020-08-06 01:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abadcfb0487ca72335b05f2f4e3943f8 SHA-1: 88df5df4ea8dcb39b733cce927b668cad9e91a73 SHA-256: e14ff8dcc806c1a1508e17e69352187f63b018ef0e213a2f81a45da9f27c8e4b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=argumentative+writing+middle+school+pdf'. This URL is embedded within the document body, suggesting a social engineering attempt to trick the user into clicking it. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=argumentative+writing+middle+school+pdf
    • http://files.smile-movement.com/uploads/1/3/1/4/131437233/3713535.pdf
    • http://files.foodallergyconnections.com/uploads/1/3/1/4/131454216/9149812.pdf
    • http://files.en.revesalpins.com/uploads/1/3/0/8/130813409/sivekakodegoraxujok.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/nuvajozurelogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/78173116619.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/achy_breaky_heart_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/89828184471.pdf
    • https://cdn.shopify.com/s/files/1/0447/1989/8777/files/download_manycam_old_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/sisamefa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/forficula_auricularia.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/vixik.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/wedibibotawigivemet.pdf
    • https://cdn.shopify.com/s/files/1/0435/6076/3555/files/jiwimuzuguwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/52255065649.pdf
    • https://cdn.shopify.com/s/files/1/0431/6459/8434/files/propaganda_techniques_examples.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8173/files/wufenowuziwabegono.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/tupaxosavizedusikaxaxitit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0317/files/mn_new_hire_reporting.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_off00006a10.bin
05a9ede534aa30dede3e2d3d58c515712a6c3ee1ce14f7c10a1b01b18fbc9342
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A10 5708 bytes
font_01_sfnt_off00007d6b.bin
0dac6c09f384db2833e1416ad46c6af189aa371e211a2c4e91eb1cc221064ad3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6B 9948 bytes