Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c12a4444712ad7…

MALICIOUS

PDF

37.1 KB Created: 2020-10-27 07:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c58fed95365cad1aa650c82fdf52e1fd SHA-1: d7dcd8181eac8c4cbe6c2780ff264837dcf1710d SHA-256: 19c12a4444712ad7bd0366aa092d53175b3f397939d93349d6064b695f75b914
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/123?keyword=land+diaper+bag+amazon'. This URL is presented within the document body, suggesting an attempt to trick the user into clicking it. The presence of numerous other external links, many pointing to PDF files on strikinglycdn.com, indicates a link farm strategy, likely for SEO manipulation or to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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.cc/123?keyword=land+diaper+bag+amazon
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f87b6a4571c8.pdf
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5f8ef86142f36.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/da8009bb-191d-49ac-a393-daca8e4191d4/16728398034.pdf
    • https://uploads.strikinglycdn.com/files/d4eff014-8d53-46e2-9389-ec8fb871fbc0/restraining_order_anoka_mn.pdf
    • https://uploads.strikinglycdn.com/files/56a8321d-a7e7-4ef6-8267-498ececcc8b5/lukixabumomabaxinitewopa.pdf
    • https://uploads.strikinglycdn.com/files/a95c6464-eb03-4f16-bfc3-ceebc69e15b7/gifejopavoxozuvolobaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/interinstitutional_style_guide_french.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/gta_vice_city_jetpack_cheat_code_android.pdf
    • https://cdn.shopify.com/s/files/1/0268/8529/2223/files/90496204739.pdf
    • https://cdn.shopify.com/s/files/1/0497/3766/2615/files/aroma_lite_diffuser.pdf
    • https://cdn.shopify.com/s/files/1/0475/9276/7644/files/puritipov.pdf
    • https://cdn.shopify.com/s/files/1/0496/7097/9741/files/jersey_mikes_turkey_sub_calories.pdf
    • https://cdn.shopify.com/s/files/1/0506/6591/4555/files/xowajevaroxigagekexaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7974/files/46740907120.pdf
    • https://s3.amazonaws.com/tiluwisulepam/84644362851.pdf
    • https://s3.amazonaws.com/vonusirukete/22653109774.pdf
    • https://s3.amazonaws.com/pazifetanegapu/78422601561.pdf
    • https://s3.amazonaws.com/rizezobabub/28639813832.pdf
    • https://s3.amazonaws.com/temujonuwu/wuvonorefitipeleroram.pdf
    • https://s3.amazonaws.com/susopuzupure/bgv_theorem.pdf
    • https://s3.amazonaws.com/jobavo/4217164941.pdf
    • https://s3.amazonaws.com/degisapemifa/54774333455.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_off00005356.bin
a96c2b931946f706d12c903d9841ab82dac1d6eb32ca4cad6620a03c6eef1a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5356 5200 bytes
font_01_sfnt_off000064f3.bin
9b6ed90e60a603f9404448e0d2f6358c294d5f698743b45d874e8880fc890d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F3 10108 bytes

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