Malicious PDF — malware analysis report

Static analysis result for SHA-256 117ef17c6cad42ce…

MALICIOUS

PDF

47.3 KB Created: 2020-08-04 23:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 453655670a7512be11278eda6b4329b4 SHA-1: f65bf7b3691591e39f5d5fdd19f64f9d5bca56c8 SHA-256: 117ef17c6cad42cef1a4488fafb8fbc1a850d466b95452dbf9eab62b771f1c7d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. This suggests a link farm or redirection tactic to obscure the ultimate malicious destination. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=cardinal+points+optics+pdf
    • http://files.marinabaldwinart.com/uploads/1/3/0/8/130813982/358ca0f24bed06.pdf
    • http://files.thegivingtreefarm.com/uploads/1/3/0/7/130776745/pekema.pdf
    • http://files.silverdollardogs.com/uploads/1/3/2/6/132695620/refogupakenovow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0435/files/new_holland_lx885_service_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/64288217331.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/10635758228.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6848/files/john_deere_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/wanenodisagosanodetox.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7663/files/6._snf_aritmetik_ortalama_sorular.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/72879930772.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/pokeworakotibanad.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7969/files/3108572100.pdf
    • https://cdn.shopify.com/s/files/1/0436/0011/7928/files/vice_city_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/lonolol.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006668.bin
8cb1e017ae8b3c48a6b0409bc1cc1c19746a76c0b7976e29f6bac52f5b989b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 5052 bytes
font_01_sfnt_off000077a1.bin
429d8c1e9b7942ff1e7edb5ceec71312c7c15b55bba69e9fe212bb38194f6a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A1 10432 bytes
font_02_sfnt_off00009b96.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B96 16036 bytes

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