Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5f9bc7ccec99b7…

MALICIOUS

PDF

39.4 KB Created: 2020-08-09 12:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e5e68cc6cd4986e798a7051925597ed SHA-1: 23908db0a60e21af169c49e1b4bca75b2e2c668f SHA-256: 7e5f9bc7ccec99b76fca4b5e69121e8c3d282d888b31374213ff79d896cdc0e9
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link redirects to a malicious infrastructure at 'ttraff.cc'. The ML classifier also strongly indicated maliciousness. The document's primary purpose appears to be to drive traffic to malicious or SEO-spamming websites.

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=clinical+nutrition+pdf+download
    • http://files.aquaterrespa.com/uploads/1/3/1/3/131397946/c683b5f76ebfa.pdf
    • http://zixoxurep.lightbobs.com/uploads/1/3/2/7/132712615/mexug_nunimujojut_vovetupesikefo_wawevukefola.pdf
    • http://files.nicholaspaulmccarty.com/uploads/1/3/0/9/130969761/webeg_xejarebutalow_xagixi_wokidito.pdf
    • http://files.rhinoultimate.com/uploads/1/3/1/4/131438137/zomuvadidizaze.pdf
    • http://dowedosop.hilltoptelevision.com/uploads/1/3/0/9/130968921/9c360f7ee295.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/3087/2215/files/drought_resistance_mechanism_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4596/1383/files/zipafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/99357794854.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1780/files/93646287852.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/jaxajupibajajejopexadujod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/pop_up_camper_repair.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/maruliveretoxoxexodisew.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/addition_property_of_equality_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2911/0685/files/nefekamojavoriginetux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/xexemeru.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/74633983729.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/dirunutazi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000503f.bin
d2aa993014f8731353a00fd4886cc1399901901390cc8c63734b320d7f50cd54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x503F 4852 bytes
font_01_sfnt_off000060cf.bin
b6dd981881ad6ead88289431db8758a541bd2bae06282d8ea61bc2ff35ad44e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60CF 9868 bytes
font_02_sfnt_off0000827e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827E 4324 bytes

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