Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e27d645984ac629…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 11:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64c888544f213ae663f4f3d20e04f489 SHA-1: 472063e4c3fafc73521755539bccd8032d1a97fc SHA-256: 1e27d645984ac6291d7bb13ece6ad12278ae97e623e2c9eaf5b1976324766d8f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=atividades+alfabeto+pontilhado+letra'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being to a Shopify domain. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF filename, suggesting a lure to disguise malicious intent. The primary attack pattern involves redirecting the user to a malicious site 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.ru/wix?keyword=atividades+alfabeto+pontilhado+letra
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/new_life_celebration_church_of_god.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/espn_insider_hack.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/radigub.pdf
    • https://cdn.shopify.com/s/files/1/0432/7528/8742/files/biological_evolution_of_man.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/ibps_exam_online_form_fill_up.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6616c7f9bb64566a709e333336c85f1.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/88482310881.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/spelling_words_list_e-_3_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/81644869682.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/tukamorugefezokamet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0603/3052/files/my_verizon_ringback_tones.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/www_puzzlemaker_discoveryeducation_com.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/wufokutifobokuruf.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_off000061a3.bin
cc84d8428a87be64a4ef5333a386158632cf5da4287dbefc2e2ec7f229c32904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 5320 bytes
font_01_sfnt_off000073ad.bin
0964e506d48b188b26a743e8eadfbaf40bf3d3f452123875ec270e26d366ca7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AD 11756 bytes

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