Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7ae13b649b5cc9…

MALICIOUS

PDF

35.9 KB Created: 2020-10-11 10:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fb6f4331b473a7c914affa35cbc068e8 SHA-1: 57fa982387c661b25b28afecdf7f5d6af8c453ac SHA-256: ee7ae13b649b5cc9a51219f95c1f99bc801bf95ea85dffd849f12a753d5d4efb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at https://cctraff.ru/strik. The document body, though heavily obfuscated, contains this URL and references to 'the plant paradox free online', suggesting a lure. The presence of multiple Shopify URLs, while some are benign, indicates a link farm strategy. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

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://cctraff.ru/strik?keyword=the+plant+paradox+free+online In PDF document text
    • http://putiti.mtm-inc.com/uploads/1/3/1/1/131164250/muvogafesufav.pdfIn PDF document text
    • http://fidul.dashatron.org/uploads/1/3/0/7/130775692/denad_zujimat_wefexelidu_tubimexib.pdfIn PDF document text
    • http://files.spencergroupinc.com/uploads/1/3/0/8/130874043/13accbe.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/1/0266/7806/7393/files/75606251464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0208/7584/files/craig_bluetooth_speaker_cma3762_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/idaho_death_records_2002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7628/1025/files/pikufokugibud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7672/1051/files/somafez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9199/8360/files/ganumugopolipowurojuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9766/0835/files/shark_navigator_dlx_nv70.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4412/2009/files/29516984599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3384/5142/files/merepokozuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4397/7366/files/79909355535.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50BE 4968 bytes
SHA-256: fdf21838e411021bd0dfbc4af11a1539f476f4995c6316c2911c743ee321b2ed
font_01_sfnt_off000061a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A0 9716 bytes
SHA-256: af90548af65efb57c001bbd9b37b6d1b87fb7a1aeb41f87f2a07661cc65d7882

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