Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58708b0f975329a…

MALICIOUS

PDF

66.5 KB Created: 2020-09-01 22:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2177637261d57aa8042acb8655aa340 SHA-1: 2bc5f25547aa0fb9f67b5a2ba2e611ff13e7d0a1 SHA-256: e58708b0f975329aa0e13a0d56cd8550e3b4c0200f338a5ea689699325ec0364
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'carls sims 4 guide pregnancy cheats' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=carls+sims+4+guide+pregnancy+cheats
    • https://cdn.shopify.com/s/files/1/0435/9123/7791/files/pimagakuvebanaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/meeting_invite_template_sample.pdf
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/33121418652.pdf
    • https://static.usrfiles.com/ugd/4d400c_3ab53386d29141aca2f853fece2fcc1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_04d8e41eec2e4a3e8810ceb995697b7c.pdf
    • https://static.usrfiles.com/ugd/9b5f63_fc1a4577f12f456db2cd54963b712bbd.pdf
    • https://static.usrfiles.com/ugd/a86d68_2eb5443c1a5a45b799663fcd61f75359.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/delapawogukusuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/chemical_reaction_engineering_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/46753858806.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/tijopebizijijiwefekusafik.pdf
    • https://cdn.shopify.com/s/files/1/0432/9563/7659/files/80754773630.pdf
    • https://static.usrfiles.com/ugd/cb2bed_9f1620c9a8244c54adb2851729b3e845.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecb7db2ebfd14b9392d61fde998c4381.pdf
    • https://static.usrfiles.com/ugd/18f527_31ed9e59b5a94fb09bd8490d58fbc65c.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_c0e6bfe32c7f4d49898f884d333210cb.pdf
    • https://static.usrfiles.com/ugd/8127dd_494bdd3c53074935a1b9cd8f66713c37.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a5cf.bin
4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CF 6588 bytes
font_01_sfnt_off0000b648.bin
8edb7e9fdb5bd9ac644446c0076c4b2791a926ed145b5db14b8de3c7565b9e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB648 5472 bytes
font_02_sfnt_off0000c8c2.bin
8e9a475e97ab343e912d326d47dc4c44de547baf5142bfa10ad6a6de4a854419		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C2 10804 bytes
font_03_sfnt_off0000eda8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 4324 bytes

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