Malicious PDF — malware analysis report

Static analysis result for SHA-256 a819d343eb5ec7e9…

MALICIOUS

PDF

44.9 KB Created: 2020-09-18 08:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02f7674fafed49c798aa544e25a850e4 SHA-1: cdaba000a0c5303688103f2307c26fac7093941a SHA-256: a819d343eb5ec7e9bedb59f334587c1ffcf69d59e1c52a0d4a609866ee2e7fc1
150 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, specifically pointing to 'https://ttraff.ru/wix?keyword=nc+apa+style+manual+6th+edition+pdf'. This URL is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to the same URL, reinforcing its role as a lure. The presence of a large number of embedded links, many of which are to benign-looking PDF files, suggests a link farm or SEO poisoning tactic to mask the malicious redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=nc+apa+style+manual+6th+edition+pdf
    • https://266a4066-5ce9-420e-857b-ccb317048b46.filesusr.com/ugd/11b39a_292d87f720504920a40b22835a28dc75.pdf?index=true
    • https://e72f0088-e076-497c-b11a-55570e73a996.filesusr.com/ugd/296484_489e5e8a0f7b4b63ac4927e876dfbced.pdf?index=true
    • https://21b05a0d-71e8-4fb3-a299-5e7aafbc8ec3.filesusr.com/ugd/6908d7_702f5227f9994f4592579a716b6e43b3.pdf?index=true
    • https://3ba06e97-02f4-438b-ade0-54c69f9c98fa.filesusr.com/ugd/8bc2a6_799077095b3c4cde8f6c60c11b1fbcde.pdf?index=true
    • https://9ffc7b55-404c-4c49-a500-044b203c42ee.filesusr.com/ugd/ee4a13_a939607a8810410d8ab0d4e714462b0a.pdf?index=true
    • https://924a8f47-d855-4dd2-af8e-ef00be04c214.filesusr.com/ugd/fb5067_f4ba6d40f7b745c78b7974c00e93439d.pdf?index=true
    • https://adc9b3e2-d5af-47be-99fb-adaf83e8753e.filesusr.com/ugd/e8506d_131ecb8d0a3e4dde96dae07a19d51460.pdf?index=true
    • https://dea1c2e3-494e-455d-94f5-740949166d24.filesusr.com/ugd/03dcd4_b62e6532ef714ccdbd5278f17d8af337.pdf?index=true
    • https://0f959f0c-3f24-423a-a216-bd576ac22ba8.filesusr.com/ugd/48bf55_79855a77fdf04a4eb6494db1394cdaf3.pdf?index=true
    • https://9185236b-c863-42e7-af53-4666d561d293.filesusr.com/ugd/dad7b5_46db532eb8cf46709c72a51b81550552.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/3697/5004/files/school_awards_ceremony_invitation_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/sql_server_management_studio_2020_r2_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/crossfit_open_20._4_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/wokuzipaxivaxazakowitofas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.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/1/0432/7089/7824/files/wokuzipaxivaxazakowitof

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000713a.bin
60f607f43f9b499716d3106751d08886207cff31a5b9ab0a3a7046a32ce819fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713A 5524 bytes
font_01_sfnt_off000083f0.bin
81e81d42d5d56f3ad916d9ba0de57eb23f367271c389be0a5e36d8e79f0c4303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F0 10168 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.