Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1d9234af90395e…

MALICIOUS

PDF

43.2 KB Created: 2020-09-04 16:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7093d63f173d55b3a36fcecf3cea50be SHA-1: 64fc326beffe96f7209f7a7b333695105c989258 SHA-256: 0c1d9234af90395e81fc1a90949211cb10669832347c6a435d376af66c6ac986
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.me/pify?keyword=simple+past+tense+worksheets+for+grade+3', is flagged as malicious. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious content, likely for financial gain or further compromise.

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.me/pify?keyword=simple+past+tense+worksheets+for+grade+3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/cf79db_18a077a6d6e4428f924ce1a70faf697d.pdf
    • https://static.usrfiles.com/ugd/d1d005_da1a7a461ae94eb1b6eb81e71daaa568.pdf
    • https://static.usrfiles.com/ugd/a4ea6c_4173ef6734824991adbaf0706732ec50.pdf
    • https://static.usrfiles.com/ugd/de9003_8890dfc4b4f247bbb3d1df645d36570d.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/cysa_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2315/files/how_to_turn_off_notifications_on_mac.pdf
    • https://static.usrfiles.com/ugd/108936_ce0a4ab95c094ff4beb4ea232efa7a2c.pdf
    • https://static.usrfiles.com/ugd/cf79db_b47e0df1ec774c74ac7eff59a25a21d2.pdf
    • https://static.usrfiles.com/ugd/599f1c_f1949836118e422c81899aa547aa8862.pdf
    • https://static.usrfiles.com/ugd/fd7405_6be8628105664372b0fe888bd5880bf5.pdf
    • https://static.usrfiles.com/ugd/9c8fb9_22fc351399264ced9dd72bc44cdd5777.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/deltoid_rehab_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/89358424046.pdf
    • https://cdn.shopify.com/s/files/1/0434/1874/7036/files/85441709519.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_off00004864.bin
744c49c17fd12e5a277c5cb7e5e2fd78140a2eb98b01f2168d6a132598fd0101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4864 5664 bytes
font_01_sfnt_off00005b82.bin
87a44808951c3cc76ca317ca2b0bc42787d8aa06ba18279f07d6beb811803ab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 9564 bytes
font_02_sfnt_off00007c80.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C80 16060 bytes
font_03_sfnt_off00009116.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9116 4324 bytes

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