Malicious PDF — malware analysis report

Static analysis result for SHA-256 284c414d23db2765…

MALICIOUS

PDF

44.7 KB Created: 2020-09-01 04:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1bc8ad21d1d81956c1fa32477484c40 SHA-1: 472bc7adb8d3670398df65e216c02f5d20a3fbe1 SHA-256: 284c414d23db2765956dbc533ecdc713c79473f63f771d7650c915f68b4ed9dc
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits a PDF link farm pattern, embedding numerous external links, with the primary malicious URL being 'https://ttraff.ru/wix?keyword=english+action+movies+free++dvd'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a lure to external content. The ML classifier strongly supports the malicious verdict.

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.ru/wix?keyword=english+action+movies+free++dvd
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/jejuximejoje.pdf
    • https://cdn.shopify.com/s/files/1/0466/5321/0789/files/5358123539.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/android_studio_3._5._1_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/77680966675.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/11473486009.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/how_to_join_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/xiwizijuwevedowivurej.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/jozuso.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/abecedario_japones_katakana.pdf
    • https://cdn.shopify.com/s/files/1/0437/6625/1677/files/asme_conference_paper_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/6485176063.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1367/files/arabic_language_course_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/lease_purchase_agreement_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/70140140756.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_off00007077.bin
d324538654dbb1b270c4d195b6c6d0eae90b08a7cb63464729f4d23049645070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7077 5452 bytes
font_01_sfnt_off000082e6.bin
f39d29ddcdd4a31d14dbd7aab4a0143f7d2fa2f93c71770841919113c78fb2fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E6 10288 bytes

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