Malicious PDF — malware analysis report

Static analysis result for SHA-256 858ef781c7e298c4…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 23:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e7602d4f6519e6f6d1e19de60fdbb5f SHA-1: 36bcc81d6532f94e17812923cf02b1a381c98c57 SHA-256: 858ef781c7e298c4bc1318b5833656eb9203cd21b776ae22940e2711e8f0b539
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a software activation prompt, which redirects to a malicious URL. This is a common social engineering tactic to trick users into visiting malicious sites. 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.link/wix?keyword=adobe+acrobat+pro+license+activation
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/e3ff21_7419a40eead74a67b943abc6ae842556.pdf
    • https://static.usrfiles.com/ugd/b8c837_8810646556304b8db3d75e64039a340e.pdf
    • https://static.usrfiles.com/ugd/516793_59145dfd5c1f4ba0a329a29f7b681e99.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_97bcefe8e9a84f90bb3398b3e9494a2c.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/2954482926.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/tupudadifixakemepe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/tivenujalojukorowogub.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1547/files/oxford_dictionary_english_to_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/duxosuz.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_585777bc34a0428fadc9f88e6debdaa1.pdf
    • https://static.usrfiles.com/ugd/d01287_dc5718e361704147a4aa18b2b34bc631.pdf
    • https://static.usrfiles.com/ugd/b8c837_6095cd605a4b43bca7bb6f59728d8c0f.pdf
    • https://static.usrfiles.com/ugd/8cbfce_dc1dcdc2d475481a82ee4e9003069a6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c0483a44233446fa93c17cea1211680.pdf
    • https://static.usrfiles.com/ugd/ecec20_7fb4484a863544219f42191f04f7723b.pdf
    • https://static.usrfiles.com/ugd/90423f_b0f0d56fb98c499a810d791ce67ab17f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b38.bin
907b980966f13e4287a56bee628675f208954cc6da7133db3a7b98cb3c620078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B38 5044 bytes
font_01_sfnt_off00006c62.bin
ba91e3d1ebaab01bd0f87c2605a61bd11b0c986c04fc282d400cd9c396c9a4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C62 10308 bytes
font_02_sfnt_off00008e9e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9E 4324 bytes

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