Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbc622ea40933bd…

MALICIOUS

PDF

47.3 KB Created: 2020-08-06 02:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfe62ae7199b3deacebc6fc852142c13 SHA-1: 004b2307998c1bea49c350c05f6feadaf59e08de SHA-256: 8cbc622ea40933bdba309c11bf981129dabec20948acfa99650e2e4d3f4fb7c1
154 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with a high density of embedded URLs. One prominent URL, https://ttraff.com/pify?keyword=psychological+conflict+theory+pdf, leads to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests an attempt to distribute malicious content or phish users. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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.com/pify?keyword=psychological+conflict+theory+pdf
    • http://files.yihsiuyeh.com/uploads/1/3/0/8/130874217/verubopesipe-wuzonuvare-vajipodofi-gatajo.pdf
    • http://validal.homemadefromtheheart.com/uploads/1/3/2/8/132816202/7cbbeeceb3e8ed.pdf
    • http://files.lindsaysilva.com/uploads/1/3/1/4/131436956/6804795c77.pdf
    • http://nawil.lhnaz.org/uploads/1/3/0/9/130969904/benukov-wafonefobef.pdf
    • http://files.christinaedmondson.com/uploads/1/3/0/7/130739023/nawijevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7614/files/23258899468.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/80393108832.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/kutujo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/22974939111.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/faredeloweliken.pdf
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/sebeziposalosajodosimusej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jexisobipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0960/files/xubufebamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/95943349057.pdf
    • https://cdn.shopify.com/s/files/1/0435/0682/7429/files/libro_los_evangelios_apocrifos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/90008312805.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8428/files/77089080887.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bfc.bin
61d9e9294a5e672960db562a9edae6a652ab7b3f430d849e11791136da6c21e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFC 5520 bytes
font_01_sfnt_off00008ec7.bin
80d16634daf110cc3743ea57c0792449e8e6dc5ec600244b517226adcf5497fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC7 9860 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.