Malicious PDF — malware analysis report

Static analysis result for SHA-256 012b597e5c7d5701…

MALICIOUS

PDF

45.7 KB Created: 2020-09-07 03:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e920f54aafb3683aabad067006edb7 SHA-1: af6776fdc1973e482a9c5ae04096ca98a8d15788 SHA-256: 012b597e5c7d5701aaff1787b840356696a5ad83c176af25030a804462262b2d
162 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to direct users to harmful content. The presence of 'SE_INVOICE_LURE' suggests a social engineering pretext, likely to trick users into clicking the malicious links.

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.link/wix?keyword=arduino+simulator+android+app
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e42ee3_a2b645cf14e446a1bbd89e451aab6ecd.pdf
    • https://static.usrfiles.com/ugd/857e61_8483d5ad0473461282cf519467cb43e0.pdf
    • https://static.usrfiles.com/ugd/bfbc46_55570f9a4ee84482995e79687d1f7879.pdf
    • https://static.usrfiles.com/ugd/1a89c8_ddd8340890f34ca6924643d76d50fcfe.pdf
    • https://static.usrfiles.com/ugd/1df9ea_84d1082d0a8040b2ac0c3159b6ebbfea.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/wopajajala.pdf
    • https://cdn.shopify.com/s/files/1/0434/8854/2872/files/ugly_duckling_don_t_sub_indo.pdf
    • https://cdn.shopify.com/s/files/1/0461/9354/1269/files/laxipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/kokuwurufesik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/pasanidubovaguper.pdf
    • https://cdn.shopify.com/s/files/1/0463/1707/6637/files/zerolufibodiximejijixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4485/5195/files/hssc_lab_attendant_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/61490752399.pdf
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/jiwamebigijasodiseku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/zujanuzolakosilonare.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_43e11a0bccd1470181738447c403420b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce9bef7a5b524514a2015b534cdf4826.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba1f802286d44e0090a49df6032326b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2392707558e499596ef8bb8350b9943.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_off000074de.bin
3a762ec383c794a02163a4336af9720c7974235023ae0d705f868dc90c596200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DE 5092 bytes
font_01_sfnt_off00008613.bin
028014b9ddabfeb147aaa2a3f4168f2a23492be66e5aa72fd3188c780d5c1d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8613 10536 bytes

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