Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a88598aca609657…

MALICIOUS

PDF

36.7 KB Created: 2020-09-01 00:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 142122f883c3ce06615dd5fdc851e0f7 SHA-1: a4c437948882924a99f0954c7552783ce0244501 SHA-256: 6a88598aca60965732add61cf23cd3d9180301d8fad8e0987902e17355112095
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=victoria+alleluia+sheet+music'. Additionally, it features a link farm of numerous PDFs hosted on Shopify, with one example being 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf'. The document body text, though partially garbled, includes the search query 'Victoria alleluia sheet music' and the malicious URL, suggesting a lure to a malicious site.

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.cc/wix?keyword=victoria+alleluia+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kixekitigatozodevejale.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/cells_in_the_human_body.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8981/files/miwonofawekizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/23843293127.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/88375673125.pdf
    • https://cdn.shopify.com/s/files/1/0431/7862/3138/files/biblioteca_del_evangelio_sud_apk_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6262/files/35264684098.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/building_construction_illustrated_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/melijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/51778002238.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/convert_file_to_ms_word_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kazapuv.pdf
    • https://cdn.shopify.com/s/files/1/0440/7469/6856/files/36837377008.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/inseminacion_artificial_en_camelidos_sudamericanos.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050ee.bin
95be0ec0afc6a4fc3f25406b74c7288ec251878af884296a5e6d991d383fbe37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50EE 5004 bytes
font_01_sfnt_off000061c7.bin
419dd98050916bdef978d0f942cadbeed4559c89aee3ba6eb70a8a7b4e04d7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C7 10712 bytes

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