Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48f630b37f7fcd7…

MALICIOUS

PDF

41.3 KB Created: 2020-08-25 03:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65637eb7c76689ffd13968de4cdae00a SHA-1: 6578725f3d79faad7f22a8a84ce90df2f0eb6fb4 SHA-256: e48f630b37f7fcd780dfefde6591c156616ad0f89a9fb3546aabf2a9b77631dd
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'adding decimals worksheet 3rd grade' and the malicious URL https://ttraff.cc/pify?keyword=adding+decimals+worksheet+3rd+grade, suggesting a lure to a malicious site. The presence of numerous shopify.com links, while mostly benign, are part of a link farm strategy. The primary malicious URL is used to redirect users, likely to a phishing page or malware download.

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+decimals+worksheet+3rd+grade
    • http://nogemod.alexsandrapapoban.com/uploads/1/3/1/6/131637649/9bdf5c7.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/3323630494.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/fazenojivalusabese.pdf
    • https://cdn.shopify.com/s/files/1/0439/1901/6104/files/71254239185.pdf
    • https://cdn.shopify.com/s/files/1/0430/1419/3311/files/65814963436.pdf
    • https://cdn.shopify.com/s/files/1/0448/1482/7677/files/mcfarlane_sports_figure_price_guide.pdf
    • https://cdn.shopify.com/s/files/1/0441/0189/4296/files/functional_foods_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/clinical_pharmacist_resume.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6791/files/quantum_chemistry_mcquarrie_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0446/6461/9161/files/cambridge_dictionary_english_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/dowosevotujujel.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/pidurimimudiwimave.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.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_off00006312.bin
d09bd5b11ef1a6236e605a7f7237cb3391a975b74562fb31903d6f0cbc3f5654		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 5664 bytes
font_01_sfnt_off0000762e.bin
42b0b1865045662ff1506612c5b3f941731fb9cde0b1de8a5ab65e4b9186d06c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762E 10100 bytes

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