Malicious PDF — malware analysis report

Static analysis result for SHA-256 61778be87773b115…

MALICIOUS

PDF

51.1 KB Created: 2020-09-01 13:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be1f05715f8c930c289be6eeefeffa89 SHA-1: 2f5756bb738bc4e259a7073b947caa74331d5f24 SHA-256: 61778be87773b115e4e4e5a0835b43db0fb4dd2d7a11e3f8670424836eed76a6
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to `https://ttraff.com/wix?keyword=clash+of+clans+auto+farm+bot+android`. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to download further content. The ML classifier also flagged this PDF with high confidence.

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=clash+of+clans+auto+farm+bot+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/f09a9d_aab761e89fee4bee8a9e39e10899a2ff.pdf
    • https://static.usrfiles.com/ugd/80bfa9_7f9eb52b426940b287def19afe1f1b98.pdf
    • https://static.usrfiles.com/ugd/73cb9e_10494b9343034d31891ceec0a399dc09.pdf
    • https://static.usrfiles.com/ugd/c0b427_97331eb34ebd46b28958c606acfe063d.pdf
    • https://static.usrfiles.com/ugd/83e24f_5f7e48ae1e094a8cb9d8996b915daae2.pdf
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/customer_insight_report_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7655/files/37871768652.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/fajoxukejuxoxozuwede.pdf
    • https://cdn.shopify.com/s/files/1/0431/4061/2262/files/tafegab.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1644/files/87964780598.pdf
    • https://static.usrfiles.com/ugd/6908d7_81053ceba4714ce984adf938b546b236.pdf
    • https://static.usrfiles.com/ugd/8a419d_40bfba6dc48d46ae9f6799e6eb3c485e.pdf
    • https://static.usrfiles.com/ugd/b8c837_681f2cc7fc5c4ddc8bff164975e67588.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6210fa0add848b795733c8bad17d172.pdf
    • https://static.usrfiles.com/ugd/930050_74832a1d28304095ba32f193f89d2324.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/trigger_point_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/4511/6311/files/37974492090.pdf
    • https://cdn.shopify.com/s/files/1/0433/7231/4778/files/sujojekapowemuzugajulo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065fd.bin
a4e1d0ef60d65d422f228bc5940c25e2e572d182eb382cc4665dcc62982adeb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FD 5188 bytes
font_01_sfnt_off00007764.bin
0b854a82e0e44ee8c26ac9181dc47601da53c43cb81539016b8e71d458bda9af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 10668 bytes
font_02_sfnt_off00009bc5.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC5 16060 bytes
font_03_sfnt_off0000b05b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB05B 4324 bytes

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