Malicious PDF — malware analysis report

Static analysis result for SHA-256 6198c8d4a0c07108…

MALICIOUS

PDF

43.2 KB Created: 2020-09-05 22:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e383f5d3b09061a39052c18731ab477 SHA-1: bbbfb12648dd2ff0fd62470d26098c9ab0ccfd59 SHA-256: 6198c8d4a0c07108a80cc4ac6b851592bda72808390cf2b51446ce1824c89321
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to PDF files hosted on external sites, suggesting a link farm or SEO poisoning tactic. One of the primary links directs to a known malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=atresia+pulmonal+adalah+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/5616/5027/files/adhe_kangal_serial_song_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/84854384421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/bavimaduzitefiviso.pdf
    • https://static.usrfiles.com/ugd/1decf9_24f282bc833b486cbf6511ad48a1cf7f.pdf
    • https://static.usrfiles.com/ugd/784815_2a0c33007d9440b19e09d2db8d47b3b6.pdf
    • https://static.usrfiles.com/ugd/a13bc2_72cebadcdfaf4f749f143f265d1b20b9.pdf
    • https://static.usrfiles.com/ugd/2ca22b_3978af89e1024f21babb46c1c8c6a2e2.pdf
    • https://cdn.shopify.com/s/files/1/0434/6786/6265/files/zawomar.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/ultrasonic_sensor_hc_sr04_and_arduino_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/5388302121.pdf
    • https://cdn.shopify.com/s/files/1/0429/2683/3823/files/12478794695.pdf
    • https://cdn.shopify.com/s/files/1/0440/7322/2294/files/rodebaxikinepimaxire.pdf
    • https://static.usrfiles.com/ugd/b8c837_935a8343ec544018a841e5ed105e3f9f.pdf
    • https://static.usrfiles.com/ugd/85d67f_48b46295626f4cfc831dd8ff51c73b58.pdf
    • https://static.usrfiles.com/ugd/5c8b2f_eefc8d91697d47908bbcb65bae9533b9.pdf
    • https://static.usrfiles.com/ugd/79e5df_be899cbd398547a0aac7beb1f49813f1.pdf
    • https://static.usrfiles.com/ugd/61f964_ced1445e6fe8403da89678305d7be121.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac2.bin
ce0966ea5d61386f2678088df2f27fb6ccdc465203c7d3f976563b4b5e42a368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC2 5268 bytes
font_01_sfnt_off00007c7f.bin
06bbe76e835c3745b453100a63c7b5374c7134a70a5495d5fdc7b318b498ec76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7F 10376 bytes

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