Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ce20601d629e3f…

MALICIOUS

PDF

72.4 KB Created: 2020-08-30 18:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2150dd8f1e63004e49af986ef16ce548 SHA-1: 50be425e69a7563e0affa74fafc03053db17fd76 SHA-256: f8ce20601d629e3fdc2dc9b121d94dfdc6dce6fa42c29f03f9216bde57498fab
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=eje+del+corazon'. Additionally, the PDF hosts a large number of external links, many of which are dynamically generated, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be heavily obfuscated or corrupted, but the presence of the malicious URL is the primary indicator of compromise.

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.com/wix?keyword=eje+del+corazon
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/70725774803.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5461/files/marriage_counseling_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/77160087421.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/91098335030.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/n-_word_pass.pdf
    • https://cdn.shopify.com/s/files/1/0464/1410/2696/files/1317160341.pdf
    • https://cdn.shopify.com/s/files/1/0435/3379/5477/files/all_formula_list_of_excel.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/xanodiwabokovabusepabuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/alter_ego_4_livre_d_eleve.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/s10_v8_conversion_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/75538839357.pdf
    • https://cdn.shopify.com/s/files/1/0435/4441/2309/files/bubble_struggle_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/2974/8117/files/materialize_admin_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/centric_relation_and_centric_occlusion.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4454/files/xamolapifiwetiz.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb3b.bin
5bbb5b62047f16761873597ef077f68c0388a2b8a47705bc8630703bc6a0e60e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3B 4496 bytes
font_01_sfnt_off0000ca85.bin
884fbbb21679edcb70cfec65a63d065227b6e6d30be4fd35449c26cc7a256f0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA85 11388 bytes
font_02_sfnt_off0000ef98.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF98 16204 bytes
font_03_sfnt_off000104c8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C8 4324 bytes

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