Malicious PDF — malware analysis report

Static analysis result for SHA-256 45000f9954b485f6…

MALICIOUS

PDF

50.6 KB Created: 2020-08-10 05:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 907edf5fb547c470e31568a3fee4dc5e SHA-1: e598149d1863b447b923dd06aa3122221cf36838 SHA-256: 45000f9954b485f6db9e1e322bd0b9169288a06428c578edcb2a5aa280de2047
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as an internship letter. This indicates a phishing attempt to redirect the user to malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, likely to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

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=example+of+internship+letter+pdf
    • http://files.fortgrard.com/uploads/1/3/1/6/131636807/walunipojejom_vaposefume_kanunuxafog_bumerijara.pdf
    • http://files.theclaylion.com/uploads/1/3/0/7/130776728/3716753.pdf
    • http://files.helpmyvillagekids.org/uploads/1/3/1/3/131383319/6951268.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/57350080031.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/administration_active_directory.pdf
    • https://cdn.shopify.com/s/files/1/0430/3234/6773/files/xuvujilomipuzijupejen.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/bojen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/30789706404.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/92759408298.pdf
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/67298726409.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/50892741809.pdf
    • https://cdn.shopify.com/s/files/1/0437/1025/1176/files/49274038054.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/juwejomigijadilemererogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/fekazarupanufejimod.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_off000086fc.bin
0c6a3dbcd76bf79a4c17cd0d75d689c79bd2154ecda6132ad6a680ed82371a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86FC 5308 bytes
font_01_sfnt_off000098e4.bin
78c5f4ed09368b10801c52f03c4c94e06c72185147b93760d998ce04345d79a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98E4 10768 bytes

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