Malicious PDF — malware analysis report

Static analysis result for SHA-256 829b8593b1c999b2…

MALICIOUS

PDF

44.3 KB Created: 2020-08-29 20:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6f446714dbe0c495176fbd68adf5942 SHA-1: 3cd12bddac30c363dd21ad15c33043b5436106f6 SHA-256: 829b8593b1c999b28601dc967490861f372cd4ab1638cf757c4041d85825d1cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=el+padrino+3+online+latino', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'El Padrino 3 online latino' and the wkhtmltopdf application, suggesting a lure to a potentially malicious site. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, further supporting a malicious intent to distribute content or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=el+padrino+3+online+latino
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/ct_angiography_lower_limb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/neuro-_linguistic_programming_workbook_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0460/2780/0735/files/lolepe.pdf
    • https://static.usrfiles.com/ugd/b8c837_169c9eff585f45d593665a06615ddecc.pdf
    • https://static.usrfiles.com/ugd/b8c837_bab8d139f16d40d2aa89387052243d87.pdf
    • https://static.usrfiles.com/ugd/8b2c09_fde0ac25f97c4031bebf82394ef94e35.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa232c00dec347458a860aaa1b17f07f.pdf
    • https://static.usrfiles.com/ugd/b8c837_03c4e1483542468bb670d192ab0e152f.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_5103bf74acf04304acf2c9fd42fca8da.pdf
    • https://static.usrfiles.com/ugd/0c268c_843f1066e4b74455a563c8410f6f1736.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/social_security_form_ssa-_521.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/boteputil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/nawitotifetuvexokozigu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7249/4495/files/barron_s_sat_subject_test_chemistry_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6291/1391/files/geloda.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000714f.bin
a600fa3087a84819cdbb2b74fba1bebae4f7a383d717aa0d7cd8e17b2a2ac7b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714F 4896 bytes
font_01_sfnt_off00008207.bin
7f97c3698586267988bfc32a4e1ad3f5b1136a3416186ecf991ba2040c673558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8207 10164 bytes

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