Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a98730279b317f6…

MALICIOUS

PDF

45.3 KB Created: 2020-08-26 14:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed4c9de17436a3554110c9568b55a9d2 SHA-1: 4e2fb34477f5833f573187bb401163e82103bb0d SHA-256: 2a98730279b317f6870979b2321f88ce9bba16805dd3e491e87ebc3c993dc573
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, a tactic often used to obscure malicious destinations. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=adidas+d%25C5%25BE%25C3%25ADnsy+tr%25C3%25A9neri+D%25C3%25A1tum+vydania'. The document body, though heavily corrupted, appears to contain the same lure text and URLs found in the heuristics, suggesting the primary goal is to redirect the user to malicious infrastructure.

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=adidas+d%25C5%25BE%25C3%25ADnsy+tr%25C3%25A9neri+D%25C3%25A1tum+vydania
    • http://wimisad.shireendoumaart.com/uploads/1/3/1/8/131858530/goxope.pdf
    • http://files.tarifgo.de/uploads/1/3/1/3/131378950/9a25a210935499.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/kalamaridiwerumatela.pdf
    • https://cdn.shopify.com/s/files/1/0452/5555/7282/files/bhagavad_gita_book_in_kannada_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejolezogumulugadajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/68052934984.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/kakugosunilawapasufowadi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/watapegimekemivajujitawe.pdf
    • https://cdn.shopify.com/s/files/1/0436/3249/2704/files/office_ergonomics_risk_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/2855/3634/files/rapidex_english_speaking_course_in_gujarati_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634f.bin
8801a29c292f97849467477817e082cb86f1699625379bfcb9996a8f727ce06e
pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 5696 bytes
font_01_sfnt_off000075c9.bin
8db65adc699bed2ed4e99b174e414cace916d9ae25f4e5597e3d94de4d1667c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C9 2116 bytes
font_02_sfnt_off00007f71.bin
632f35402bd390fd99d25d2d0df371cb49a724ff9d519916fb807bb1391e4d37
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F71 12704 bytes