Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70ff210c0902412…

MALICIOUS

PDF

52.4 KB Created: 2020-08-08 20:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 561e22cb392df246173fb490f2e664b1 SHA-1: d6428593553f2f93f7022608e4f13901344b003c SHA-256: d70ff210c090241260be2691e87ce89e0be650d81790d5b43c5427791f1aeb0a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=don+miguel+ruiz+les+4+accords+tolt%25C3%25A8ques+pdf In PDF document text
    • http://files.orgorg.co/uploads/1/3/0/7/130775679/todarebim-xiduribimo-wawebalevupewem-kajexixuni.pdfIn PDF document text
    • http://files.glowstixstudios.com/uploads/1/3/2/8/132814303/muzabajex_tuzufopubeluj_lumudixikevo_nipujibopo.pdfIn PDF document text
    • http://files.opentheropes.com/uploads/1/3/0/9/130969346/wisap_sagegaso_gutad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8792/5143/files/22342233165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/jimazowoxakakogiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/56691465155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/63075656415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/53123310479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/96996670056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/devoludidulutipoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/daily_devotions_for_youth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/26567756127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/biblia_de_estudio_en.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6747 5880 bytes
SHA-256: 1c9b11c7ca51aea2e033176c590a86a0fdca1da900ad45da06e32251941de7b2
font_01_sfnt_off00007afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFB 2448 bytes
SHA-256: 018ce71b03b0a860c0ee1406fa1c339842934110decf584f70a47bddefc2fcd4
font_02_sfnt_off000085a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A7 12156 bytes
SHA-256: 3c45c7db7f46323f50596058de52098a087ac7669494a754a91ce1a322f87439
font_03_sfnt_off0000ac1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC1F 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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