Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd073e373320144…

MALICIOUS

PDF

39.2 KB Created: 2020-08-25 17:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 725013169ff055b63afb642c6e1a9ad3 SHA-1: ac9fa1bb88fa9fc5ea27caafcba3e598a221c4ba SHA-256: fdd073e373320144f88a8a97746ade13bcc95a4deef140165b49e414dee4dc20
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially obfuscated, contains text related to 'adding and subtracting polynomials examples with answers', likely a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded link.

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=adding+and+subtracting+polynomials+examples+with+answers
    • http://liwevi.daniellerosephotography.com/uploads/1/3/0/8/130814448/2033953.pdf
    • http://files.sarahthurstensondesign.com/uploads/1/3/1/4/131407692/xavejosur.pdf
    • http://files.everythingipromisedyouisbeingsold.com/uploads/1/3/1/6/131607544/e9bb6e4ddfe2ef.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/53972195034.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/vojutejerifofomutamola.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/45398819109.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/90753552317.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8450/files/59804488336.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/banefedoregove.pdf
    • https://cdn.shopify.com/s/files/1/0459/9155/9327/files/exponential_equations_inequalities_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/encyclopedia_of_philosophy_volume_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/quraner_alo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/56753745036.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9654/files/calendario_serie_b_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5397/files/74923443193.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_off00005a44.bin
c2c6c79afe3de273335d04b1d34c1bbef0ededc4d8fe359b5404258a8c8b00e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A44 5880 bytes
font_01_sfnt_off00006e20.bin
a25ac1952994f637f164d42006b01f99e04c637885c9e79b69d1392b75a9915a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E20 9880 bytes

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