Malicious PDF — malware analysis report

Static analysis result for SHA-256 641416524bfe572c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-18 13:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9acf8faa8f902d150d5027cbd2152c9 SHA-1: 3dfd2a5caac8b29018e77216c42b1317bc2a42f8 SHA-256: 641416524bfe572caa2567b4aeb09112cb2df082cf15d02e4bdb880dc6c69fd6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final malicious destination. The document body also contains the same lure text and URLs, reinforcing the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=online+converter+pdf+to+editable+word+document
    • http://files.sproutlanguagesolutions.com/uploads/1/3/0/7/130739802/wolofizowudegot.pdf
    • http://medaxab.rellaworks.com/uploads/1/3/0/7/130775792/jawaki.pdf
    • http://zidopexof.foreverjoyphotography.com/uploads/1/3/1/3/131379552/1beda.pdf
    • http://somexez.unitedalapahabulldogs.com/uploads/1/3/1/0/131070313/2247202.pdf
    • http://xujaxe.culturemushrooms.com/uploads/1/3/0/7/130738647/mavukiwawurimer_rasogumurose_jarewu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1905/7822/files/ranoluketajirejivazulet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/wadekinonujax.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/taleluwawokub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/77049254204.pdf
    • https://cdn.shopify.com/s/files/1/0452/6299/5617/files/features_of_socialist_economy.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/85159313995.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/27621110060.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/5.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/credit_suisse_global_wealth_report_2010.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5457/files/group_reservation_form_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/resumo_livro_capites_de_areia.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/raminelu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/attacking_midfielder_role.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_off0000640f.bin
d655efe7e092926865383448c08ba9cceae553c84ae32cad451b517e36ec0c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 5440 bytes
font_01_sfnt_off0000768e.bin
d17c3742c007106bc964bbb9c2f704ea4fd67146b553648a70895f34ffd83818		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768E 10768 bytes

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