Malicious PDF — malware analysis report

Static analysis result for SHA-256 2880015a21316a9f…

MALICIOUS

PDF

42.8 KB Created: 2020-09-03 01:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b994c59e666833960da334d2a0a57028 SHA-1: bc11777fc6799afc0bf7af63852da8296d95d5ac SHA-256: 2880015a21316a9f0aee2018ec7a473468ff415eaf8a5145aeaa04d968ab792c
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.me', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Happn app for windows 10' and the malicious URL, suggesting a social engineering lure. The PDF also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farms used to distribute malicious content.

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.me/wix?keyword=happn+app++for+windows+10
    • https://static.usrfiles.com/ugd/b8c837_963a1f0ead924d0b943671f60847e9cf.pdf
    • https://static.usrfiles.com/ugd/32777b_24f4b1238e264640bd6f5595ac986154.pdf
    • https://static.usrfiles.com/ugd/b8c837_d771a117df0c467e8870d4fd291b8aa6.pdf
    • https://static.usrfiles.com/ugd/b6edda_aa86e102ec6c44e1a953fb169c260b4e.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/77947327191.pdf
    • https://cdn.shopify.com/s/files/1/0440/5100/5590/files/effective_academic_writing_1_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/16085759440.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/sizoduferorub.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/four_food_groups_canada_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/php_ajax_post_form_example.pdf
    • https://cdn.shopify.com/s/files/1/0448/3537/3213/files/aosp_extended_launcher_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8099/8302/files/introduction_to_agricultural_and_biosystems_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3416/files/sacroiliac_joint_dysfunction.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/nisereloruzupuzunivu.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_off00006a4a.bin
475a8bb031109801e7a672cbf03d9bc592b166b95601d5105a4b31d2d45cb91c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4A 5248 bytes
font_01_sfnt_off00007c4d.bin
c5ee1a530cb84fac6e046d96a3e8f8fb2775b8403ca28524bb114bc3942d79fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4D 9992 bytes

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