Malicious PDF — malware analysis report

Static analysis result for SHA-256 efaadee15334e025…

MALICIOUS

PDF

47.0 KB Created: 2020-09-09 21:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19a2960198ad444b87a80377172097b3 SHA-1: c8064d49587c5ae1b7e0545f4353b8eb65a76729 SHA-256: efaadee15334e0252c4cfc5ef378b8b1bf1389db3d88690e6a27273b4545478a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary URL, https://ttraff.club/wix?keyword=pengembangan+model+addie+pdf, is a clear indicator of malicious intent, likely leading to a phishing or malware distribution site. The document body, though heavily obfuscated, contains this same URL, reinforcing its role as the main lure. 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.club/wix?keyword=pengembangan+model+addie+pdf
    • http://winobofa.moabgear.com/uploads/1/3/1/6/131606289/3a077872.pdf
    • http://files.pros2gogolf.com/uploads/1/3/1/6/131637714/zowimagebunukevete.pdf
    • http://zilezoze.investwithsmdc.com/uploads/1/3/2/8/132814956/zutuzifixi.pdf
    • http://senubo.prolyticsconsulting.com/uploads/1/3/1/4/131406710/ee1d2.pdf
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/80931681546.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/introduction_to_bayesian_statistics_bolstad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9788/2773/files/vashawn_mitchell_turning_around_for_me.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/40490520475.pdf
    • https://cdn.shopify.com/s/files/1/0435/2960/1178/files/zombie_cranberries_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/79493020446.pdf
    • https://static.usrfiles.com/ugd/ac51ce_193170d875434a79a6da2f9ffd1357af.pdf
    • https://static.usrfiles.com/ugd/b8c837_510266711ea44240aaaeddf1757f5147.pdf
    • https://static.usrfiles.com/ugd/3cb679_08441ed51dfe4c08b02c9822e9415c6a.pdf
    • https://static.usrfiles.com/ugd/b50c55_4f76548bd6a748cfae4976695e1c9e0d.pdf
    • https://static.usrfiles.com/ugd/a7074a_b8eddf53c6504f349e951a9813eacafb.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_off00006dcf.bin
2211464a91b374cc914f5ac747a62cf9f6c51f7f761ccb531034981a67df09a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCF 4936 bytes
font_01_sfnt_off00007e6f.bin
12fcf73647523589cacbf2f4825bfb8f3830e982b5d197f5b84e6eca33b598af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6F 9964 bytes
font_02_sfnt_off0000a06c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA06C 4324 bytes

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