Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3a1e3141d48cf9…

MALICIOUS

PDF

44.0 KB Created: 2020-08-16 00:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 683f2e475029e737ab5eff0d8baa231c SHA-1: b14fb6dcf86540594753c472e38906f9e92fdbd6 SHA-256: ba3a1e3141d48cf9e6dd865e1f32a0bab27853b981c17bab50c6074f1ad73330
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/wb?keyword=boss%20rc%203%20looper%20manual', is flagged as a malicious redirector. The document body is heavily obfuscated but contains references to the same URL, suggesting a lure to a malicious site. The presence of numerous Shopify links may be an attempt to blend in with benign traffic.

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/wb?keyword=boss%20rc%203%20looper%20manual
    • http://fapakaj.hourglassdevizes.co.uk/uploads/1/3/1/3/131384240/dawunoxovop_lumaxirebojun_tewefalejoxewo_bujegokexini.pdf
    • http://files.zachroush.com/uploads/1/3/2/6/132696174/539446a.pdf
    • https://cdn.shopify.com/s/files/1/0430/7789/4297/files/chemical_engineering_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/86426602006.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/wunex.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/51758384036.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/72127470540.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/netbeans_ide_8._2_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/8388/1893/files/ritezufokejedowadag.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/82650657904.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/gikasusise.pdf
    • https://cdn.shopify.com/s/files/1/0436/1859/9075/files/carp_fishing_rigs.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/2476825755.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_off00007075.bin
a2089a726f8626b33721050ba44514a69bd3e99c0792c7623351170d85fb15bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7075 5292 bytes
font_01_sfnt_off00008253.bin
36e91d68621333fb058df5950fe19ffc1d0af695e6721e52075c81f35e6c11a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8253 9796 bytes

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