Malicious PDF — malware analysis report

Static analysis result for SHA-256 7659f715cb784e1a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-20 01:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ba1b0fbf7d9a1006f541e0742ea24e SHA-1: 39063fa789b8dc6dbe76fcf30d2d18b8a6de202e SHA-256: 7659f715cb784e1a7f34a53a106965ef1e97bb4f2b32f8eac37212f5b555792a
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised with a keyword likely intended to attract clicks. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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.ru/pify?keyword=awadhesh+premi+2018+song+video++hd
    • http://bukuf.newenglandbusinesscenter.com/uploads/1/3/1/4/131453114/nemitinimidub-jazemife-pekisuxofazed.pdf
    • http://files.chikuniradiozm.org/uploads/1/3/2/7/132740462/xulodetitubidusuxavi.pdf
    • http://files.freekidstories.org/uploads/1/3/1/4/131406892/4313200.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/sewotaderajizik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/93906461510.pdf
    • https://cdn.shopify.com/s/files/1/0430/7560/0535/files/10243149764.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/kagarabamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/10362142333.pdf
    • https://cdn.shopify.com/s/files/1/0431/7865/5903/files/b._ed_application_form_mdu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4958/0704/files/609393685.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/bemosalelogarezasorof.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/ccna_latest_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2267/files/sazaram.pdf
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/43462704514.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004876.bin
ea8010dd24102e2ec934686319dc178f286f903cedcbe99a195c8b4ef24f1781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4876 6004 bytes
font_01_sfnt_off00005cd5.bin
61c326e26b226d98d01f576201e7b027440b7a2e4cbd15d533c2645abeac6ab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD5 8588 bytes
font_02_sfnt_off0000788d.bin
16564f0358d7bb51d5933e0bc54fce3e637f2e54a0f7c2000db503787efaa637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788D 10040 bytes
font_03_sfnt_off00009b31.bin
91975caa618e541539d37c3145b24a781acca67c6bd4d8c3ac53863f02b2a841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B31 3024 bytes

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