Malicious PDF — malware analysis report

Static analysis result for SHA-256 721d1df0fb32f1bc…

MALICIOUS

PDF

62.9 KB Created: 2020-08-25 15:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a195f35eaecd9dc73a653bb0adcc8ff3 SHA-1: e973403748860810a518f7cc373179cdebebf71d SHA-256: 721d1df0fb32f1bcb7cf30592296a3e03a6c0bf587429291c2fcbe3c4d64d0d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Jackpotjoy plc annual report' and the 'wkhtmltopdf' tool, suggesting a lure. The presence of a large number of external PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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=jackpotjoy+plc+annual+report
    • http://xolotoru.region3wibkc.org/uploads/1/3/2/6/132681763/jesubanurapi-devibuzasipexik-viwukidodapakak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/how_to_download_netflix_movies_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/4741630338.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/60840781137.pdf
    • https://cdn.shopify.com/s/files/1/0436/9429/3142/files/55797313141.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/web_scraper_php.pdf
    • https://cdn.shopify.com/s/files/1/0459/7071/8887/files/20654633573.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/jolegexanuzaremora.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/lajefusozukovodinubowi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/95977345543.pdf
    • https://cdn.shopify.com/s/files/1/0460/9405/7636/files/non_enzymatic_browning_maillard_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdf
    • https://cdn.shopify.com/s/files/1/0437/3682/6007/files/let_s_go_pikachu_candy_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af55.bin
c03563a9e95556d3cb3c8d8288031e260492193a63ac6ee4c73ea7c13fdcdaa8
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF55 4980 bytes
font_01_sfnt_off0000c062.bin
c799010f7cefd6a3499fb339e7c388c088654369792d2e57f5b896800634de6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC062 14132 bytes