Malicious PDF — malware analysis report

Static analysis result for SHA-256 009f8afb07b05592…

MALICIOUS

PDF

41.5 KB Created: 2020-08-25 00:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7619f93e2bd600aa6e1f62199b80af0a SHA-1: 5df9ee365903109647ab52712a8ac1627523c948 SHA-256: 009f8afb07b055928eff5fb50f05b5ed6538b07a37c13414c97b188ccdc202dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including one to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same lure text and URL, indicating an attempt to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=finger+painting+templates+for+toddlers
    • http://gadin.caroltalkov.com/uploads/1/3/2/7/132741100/2863.pdf
    • http://files.kiahkayser.com/uploads/1/3/1/4/131407974/8139e2e4837.pdf
    • http://pogutip.ajbuilding.net/uploads/1/3/1/4/131414661/9477652.pdf
    • http://rodagix.gmcvsuites.com/uploads/1/3/2/6/132681812/zofazabovarez-kakikadu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/57085429046.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/76090658537.pdf
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/boylestad_12th_edition_solution.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/mazawike.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/74137531739.pdf
    • https://cdn.shopify.com/s/files/1/0433/3371/4070/files/bengali_movie_arshinagar_full_hd.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/el_extranjero_albert_camus_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/77853830718.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sedafasejizal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8027/files/analise_de_dados_qualitativos.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/android_phone_cannot_connect_to_wifi_hotspot.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/gustavo_adolfo_bcquer_libros.pdf
    • https://cdn.shopify.com/s/files/1/0438/9755/3064/files/gevibovizuwexuk.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_off000064af.bin
354151cb9903b8ae6fc159a96556c7052d4f99055b587f18531d17bd0e795ddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 5316 bytes
font_01_sfnt_off000076a5.bin
bb22f39dac72ccb2e33b36f38b5fcdfa9d80a15d585d6a2a15299a4bef5d8707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A5 9980 bytes

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