Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb917551c09781f9…

MALICIOUS

PDF

44.7 KB Created: 2020-09-01 01:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cd375b3d829c8da84487dfa6440679e SHA-1: 81aded4383920dd15a98a0c3c5a90946818a0854 SHA-256: bb917551c09781f9b1012e995f579e4234c943af08d9d819f3169c38d41f4bcd
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.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL and a search query related to a common technical problem, suggesting a social engineering lure. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation to increase visibility.

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=battery+not+charging+fully+android
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/amravati_mandal_news_paper.pdf
    • https://cdn.shopify.com/s/files/1/0437/6399/0686/files/barclays_bank_statement_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5571/8298/files/gutalesujipetoloxup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/menejarigowetewanina.pdf
    • https://cdn.shopify.com/s/files/1/0437/8954/9726/files/45215004677.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/39210911786.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/86370080490.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/70205762027.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/toeic_vocabulary_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/0301/0468/files/dominic_dagostino_fasting.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4264/files/julabekagixisagurawimuva.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/pezudunexedulatudi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/79274124661.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/35106695354.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1112/files/29084655516.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/on_the_far_side_of_the_mountain_comprehension_questions.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/firev.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_off0000718b.bin
2988f4382b339af0f0fb95fa8b03abe67995c65cd659838e450f0d2f6587e8e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718B 5256 bytes
font_01_sfnt_off00008376.bin
53f2d108c07acfcd34e17294123ed9b24d49d60bc0fde37069cf4a2b25b07fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8376 10040 bytes

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