Malicious PDF — malware analysis report

Static analysis result for SHA-256 84dd047b00a6c996…

MALICIOUS

PDF

45.0 KB Created: 2020-09-02 01:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6f7c51906369bfd146d59053ea4c02a SHA-1: 6faac11c4767ac89fbb9cb60c74c40253e8c495d SHA-256: 84dd047b00a6c9966ddb1fd040a6396d1329c76aa85654d9b48ea4d33bdfbd6d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix'. The document body also contains this URL, along with numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The primary malicious link is likely intended to lead the user to a malicious site or download.

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/wix?keyword=sensory+integration+and+praxis+test+pdf
    • https://cdn.shopify.com/s/files/1/0463/4332/3805/files/difference_between_addition_and_condensation_polymerization.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/razurafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2695/files/ielts_writing_task_1_general_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0465/3088/7838/files/snow_white_coloring_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/circle_geometry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3749/9302/files/68500378229.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca74d9dd5a584ad8b942c1ef8aaa3821.pdf
    • https://static.usrfiles.com/ugd/77eba6_4c50a5d7dd6c4338822c4b137cceaed4.pdf
    • https://cdn.shopify.com/s/files/1/0447/7042/7031/files/convert_sang_hinh_anh.pdf
    • https://cdn.shopify.com/s/files/1/0464/5031/1336/files/19483370956.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4748/files/gafofukak.pdf
    • https://cdn.shopify.com/s/files/1/0430/0711/5423/files/89212881465.pdf
    • https://cdn.shopify.com/s/files/1/0432/8403/7792/files/jupubevefibigimukodiw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c8.bin
e173b5915d78cc92ca89338e29fb3010bdbdb0da53bc35a8c5743666dd2df9b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C8 5236 bytes
font_01_sfnt_off000076a8.bin
1f1bb6c6853fe26050c9f55d1901b8002d40d781139a825a731b7d314a9e1e44
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 10108 bytes
font_02_sfnt_off0000992c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x992C 4324 bytes