Malicious PDF — malware analysis report

Static analysis result for SHA-256 0890f3848d3be00f…

MALICIOUS

PDF

43.4 KB Created: 2020-08-21 11:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77253c01e4a77c2f11e549a510df7bb3 SHA-1: fe5c83cccf39ea24aa1168485f5a27d0df72caa1 SHA-256: 0890f3848d3be00f834debe00e530dc57b5d607001804492cf0fd733c0687993
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector. The document body and heuristics indicate a lure related to invoices or receipts, combined with urgency. The presence of many external links, including a link farm, suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=bond+receipt+template+nz
    • http://files.mindandhomeinsurance.com/uploads/1/3/1/6/131606046/dugutajuro_renirizogulod.pdf
    • http://kijaruwe.oursaviourchurch.org/uploads/1/3/1/6/131606577/lugewoma_gefelaxa_guturatatowasi_zuduwofemukurun.pdf
    • http://tumab.byhyu.com/uploads/1/3/1/4/131407995/pupij.pdf
    • http://files.codeelectricmqt.com/uploads/1/3/1/4/131437005/nelukisomil_nopude_tator_paxilene.pdf
    • http://files.korrieleer.com/uploads/1/3/0/7/130775009/mujiko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/18851586852.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/62562779321.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/julikoteza.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/simorupureravarafo.pdf
    • https://cdn.shopify.com/s/files/1/0463/2199/1837/files/afcat_2_2015_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/76479639908.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1791/files/belt_and_road_initiative_for_win_winism.pdf
    • https://cdn.shopify.com/s/files/1/0448/4923/4081/files/b_positive_blood_group_diet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/lemofineruwuvarurexefomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taniseraguvifololesugom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2102/files/emoji_copy_and_paste.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/71218361463.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_off00006c3a.bin
9a28ed29456a1d201dfb89304f246c90379b6f8dbb3b4ac27239847432c91e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3A 5140 bytes
font_01_sfnt_off00007d9e.bin
fc1b37f374f8aee72bc28bb1e48b849e7a1adcf983b12c028a4c58334f760097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9E 10116 bytes

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