Malicious PDF — malware analysis report

Static analysis result for SHA-256 a365b75710d57127…

MALICIOUS

PDF

37.0 KB Created: 2020-09-08 03:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ed9dfb1aa1bcc2ff1af5256415b48e95 SHA-1: 95cd33648a58bf63ea081f243d97658c7dd1097f SHA-256: a365b75710d571271c863778cba6be5492a9556f3351c2a3898ec1b73a482dc5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to sheet music and the malicious URL, suggesting a lure for SEO poisoning or phishing. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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.link/wix?keyword=bach+well+tempered+clavier+piano+sheet+music In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/eb5a6a_cbc33f4375ef4f1497bc8a2c1f10a492.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/54b9a1_12831094235b4506987a0c7ee4bf3cfd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/963627_2248f66283c34262b4426b6d2dd3e801.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f55bec_22645022c2e94e4b97689e3e99609c39.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/tabopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4575/4792/files/ch_play_apk_15._1._24.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/konsep_akuntansi_manajemen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0870/3894/files/old_shayari_video_status.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4917/2643/files/crayola_hand_lettering_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7389/6615/files/bhakti_movement.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/268ab1_e622a7f16ca54dd8bcc28a861bc248db.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ab5adf_c74a239b959e469299121eac31c89fed.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0aab01_17a86259b250437ca3a2ade1b075aa38.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cfa91a_d334c29355dd41e3990d5465bca3bc1b.pdfIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47E6 5512 bytes
SHA-256: 4cabfb8b2878b34805816fd599cd5443e577c0beac693b3f0e41e72d20355aa1
font_01_sfnt_off00005a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8A 9724 bytes
SHA-256: 759f2e981bb4f11bb3fcb3933bbc0fe4c9213131caeecac4a828e7165811b81d
font_02_sfnt_off00007b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8E 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208

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