Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd5d3b202468b0d…

MALICIOUS

PDF

42.4 KB Created: 2020-10-22 13:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6f102de8eb85ed4621b4040eb05014d SHA-1: 7b0d53169de1ae4ec59e1ef7dbbf9edc893f0728 SHA-256: 6dd5d3b202468b0dd384c1e238198055a6df887b55d2a39d74f81e80341f758a
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, which is also present in the document body. This link likely leads to a malicious site or download. The document also contains a large number of embedded links, many of which are to benign Shopify URLs, suggesting a link farm or SEO poisoning attempt to mask the malicious redirector. No scripts were extracted, but the presence of embedded URLs and the redirector heuristic strongly indicate a phishing or redirection attempt.

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.link/123?keyword=up+%25E1%25BA%25A3nh+hd+l%25C3%25AAn+facebook+android+2020
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/tabutekes_mekiwodeguliva_dasatakikenit_vedatebodameju.pdf
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdf
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/zegagoragek_nepumudusoku_woguxasar.pdf
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdf
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/zomedan.pdf
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/damimodomuzegaf.pdf
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/jolokozosato_xupaf_mogivofo_tesodufinugefud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0495/4996/7527/files/translate_birth_certificate_to_spanish_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0483/9614/0701/files/kulera.pdf
    • https://cdn.shopify.com/s/files/1/0431/2560/4513/files/vabirivikogaroxiguzol.pdf
    • https://cdn.shopify.com/s/files/1/0497/5978/1023/files/x_files_ringtone_android_free.pdf
    • https://uploads.strikinglycdn.com/files/522bb34c-19be-4fb5-9ab4-6e3fc933b6b8/xezepazogezuz.pdf
    • https://uploads.strikinglycdn.com/files/4db57e98-b1e1-44e5-b074-be99bd05f484/11895176646.pdf
    • https://uploads.strikinglycdn.com/files/60ef1c14-fcb9-420f-8274-6e63b466ac04/lejotagizujemire.pdf
    • https://uploads.strikinglycdn.com/files/b74783c2-ea9d-4e36-a486-05292402e410/xagogujuwi.pdf
    • https://s3.amazonaws.com/limewub/21122888140.pdf
    • https://s3.amazonaws.com/wilugugo/describing_people_s_appearance_in_spanish_worksheets.pdf
    • https://s3.amazonaws.com/fatisake/50629464817.pdf
    • https://s3.amazonaws.com/memul/logic_gate_table.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6191/files/97577564273.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0770/files/all_dogs_go_to_heaven_full_movie_watch_online.pdf
    • https://cdn.shopify.com/s/files/1/0498/6273/8075/files/wave_2_router_login.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_off0000630d.bin
da20e9f97eb27763b9d4f48b10e90a514617e6b39980837946f4f5a414da164c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630D 5952 bytes
font_01_sfnt_off0000766d.bin
3fd7127eba20d3f941eab3e3e3e28d8eb23e0f52d55d5f3c4f958d06401f20bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766D 10464 bytes

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