Malicious PDF — malware analysis report

Static analysis result for SHA-256 d676605d6e381c80…

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 17:40:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f09e9db02c04951b75dd2189be06c068 SHA-1: 100c844fdc086c3c355077b3210583009b5d4b89 SHA-256: d676605d6e381c8033b0c4a2d963ba7556b5de2c03c834f0c87eb57387d50409
152 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading content, specifically mentioning a song title. This suggests a phishing or social engineering attack aimed at tricking users into visiting malicious sites.

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.ru/wix?keyword=download+lil+wayne+ft+drake+she+will
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/al_nahda_dam.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4935/files/7987358359.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/writing_task_1_process_ielts_mentor.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/89246003912.pdf
    • https://static.usrfiles.com/ugd/b8c837_10c84eb0503b42d9b1b9a6302486a0d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_5115728ce64343c68e1683551c93fbcf.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f3032f12afb4c728a9babcad28eb96f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3350e7732eff4e7ebd18d9e202cbc4ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_95a2de1656cb4c7db8a4ad7c9169c6ee.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/google_chrome_for_linux_centos_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/74992384317.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/gasavavoraveburodozetabep.pdf
    • https://static.usrfiles.com/ugd/b8c837_0666e95256234955a04ebe5362be9d6f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7dc2931988214758ae7ed0004285d4b9.pdf
    • https://static.usrfiles.com/ugd/34ec99_554595ac5ccd4c8891daa34627430129.pdf
    • https://static.usrfiles.com/ugd/b8c837_522641019a894c168b977696308f1137.pdf
    • https://static.usrfiles.com/ugd/d55797_adbdb47ada614c949601d905004e3113.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f0f.bin
f80473fb60a4fa378a09c13e4b4202c262277964e0e38065aef66fb48bb89ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F0F 5040 bytes
font_01_sfnt_off00006041.bin
e57b7a69b5ec2b54276619bc32e18fb44dab5da3a0f3f45656565f1f14c8f5e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6041 10076 bytes
font_02_sfnt_off000082c4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C4 4324 bytes

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