Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebf7d538db2bf6f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-22 23:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a59d03f95f6ac6a265f7d52fa34a202 SHA-1: e26ca7c1eeb1871f5b6c7fcc25a9d9525a28d1bb SHA-256: 0ebf7d538db2bf6fb88b999a9ce36f15ba76c58c993cbb2a01f195eb2167274e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links, including one pointing to a known malicious redirector (ttraff.com), and is flagged by ML classifiers as malicious. The document body, though partially corrupted, contains text related to 'Canadian immigration form imm 1000', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=canadian+immigration+form+imm+1000
    • http://files.rejoicewithin.com/uploads/1/3/1/4/131406826/rowul.pdf
    • http://files.thelakecampground.com/uploads/1/3/1/6/131606490/nalotunafebuna.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2282/8198/files/74301123539.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/8942390077.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/jewogupezito.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1827/files/pipawotisagoloxipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5801/2068/files/arikil_pathiye_idanenjil_remix_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/6377/0272/files/ubqari_magazine_june_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7682/files/xolapelitub.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/the_technical_analysis_course_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/96023033703.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/33876680358.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/15880544631.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/vemerolagemenigejo.pdf
    • https://cdn.shopify.com/s/files/1/0462/9037/0720/files/37806325386.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/74430017853.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9163/files/miami_dade_school_calendar_2020.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_off000064be.bin
85ad27825974c04933bc0c01cbd6fc42dad8f009e58f5c49a39452aefcd3617f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BE 5116 bytes
font_01_sfnt_off0000760d.bin
ee278ad70c357a851cac5574f676c2d2ad87f40e372646d13926fdacf186d91c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760D 10244 bytes

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