Malicious PDF — malware analysis report

Static analysis result for SHA-256 9110fc88be38f13f…

MALICIOUS

PDF

41.2 KB Created: 2020-09-04 22:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5c932c86ca20c1388b8461eb853a3c09 SHA-1: 2a0e72b9335e543fefc334ad3b884ea0236bf411 SHA-256: 9110fc88be38f13fd47a557580acad68169fd5fbb68be4889df49d3a8349e66e
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'cancellation letter format for flat booking' and includes the malicious URL. The presence of numerous external PDF links further indicates a link farm or redirection strategy, likely to deliver a secondary payload or phish for credentials.

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/pify?keyword=cancellation+letter+format+for+flat+booking 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/b8c837_357b1d639daf40a4a9ae5e99878a32ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/57c819_1bbaaec2c4b949db915a6526584da5bb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/83d902_f7eeafaba591469a95e6d7888d7d66dc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3f8d85_893c386961c046b2af513102a1229c19.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2274a7_031d5b72d47d4816a8b212a029a84a01.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10e3af_37f559119c474511abe085bc9ed42238.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_af3d921be24f4dfd8509b19225a31eba.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/40336e_d2375d91d159445bb2bead74e6e6587a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a59130_14ee818c38fd4bbaba251944e0e5c90e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/837d34_3ca1b8e485e34ed99730e38cccf46ff2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a7074a_62f2e682820c4a0db1e994160a575029.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0fdb6d_a0ded4e3c03842c8874752856ae03514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/42574177323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/5748381467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/rusev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/minecraft_migrate_account.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/android_phone_tracker_with_imei.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000630f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630F 5132 bytes
SHA-256: c2ca48fa25cce06a29af50a072be97c46ff6b86168d6daf972f7b1cd7dd6da53
font_01_sfnt_off00007476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7476 10288 bytes
SHA-256: a5f2f04635b10e5e139ed25653cb252aaf51df59416deeb82011b7dca27067e8

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