Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30c9bc39aedf8d1…

MALICIOUS

PDF

96.0 KB Created: 2020-09-09 05:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7fa0553216fbe04e5b941da3d0dcd85d SHA-1: 281da9d5a1838bcd391e66b6494d66f5320cd949 SHA-256: b30c9bc39aedf8d1a154b8020358b9ef08b95d2021282305de25a13a5e60c943
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or phishing pages. The document body and embedded links suggest a lure related to movie downloads, aiming to trick users into clicking the malicious URL. No scripts were extracted, but the presence of a malicious redirector and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=mayabazar+colour+full+movie+free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9357/3284/files/74023825817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/paypal_payment_receipt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7173/1880/files/50321014730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/kilosuzitinava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7247/9647/files/92331422777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/lediwipamovavixaxej.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_11a53feb3f1d4891977363a9b9ba0a44.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2c8d66_72e4559ff91b495dbdb157c23fcd5860.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/585b1d_f6424690991647d185b92ce476dba051.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ab059d_195ea5f98d0542dda7b18efa519038ea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/296484_0480f383bd4f4c329102f11dab1a804c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/32acb1_2a1c4fedbc26487996d7978fe6465afb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ba634_cc165af2bef7487c924133cc4c7d4e56.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3C 5208 bytes
SHA-256: fdc0ae1f821fc9f5136908914b420417f1b3077546ea30be4e0f56dc030325a5
font_01_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 7752 bytes
SHA-256: e476354a71b1d78cb779e6ed4f59e5ee7d4453dec416c7c1688385edc1b45e70
font_02_sfnt_off00010769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 20968 bytes
SHA-256: 19d1d07e71123834292285605ffe24df9bafab0547cd0a8583ecce33ef99ed98
font_03_sfnt_off00013872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13872 10568 bytes
SHA-256: ad3f769798e0b3d24b0223bdf850e3e745f5b77a6eaad9518e4c0fe2bed28ad1
font_04_sfnt_off00015ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA5 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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