Malicious PDF — malware analysis report

Static analysis result for SHA-256 057d1ad5b2606762…

MALICIOUS

PDF

49.3 KB Created: 2020-08-23 04:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eb381335514fe7791d278aff143d010 SHA-1: d0895a70545a5e5e25517609240eae13e5a8926a SHA-256: 057d1ad5b260676294802f818b3adc79a41792d6cbf49a1c5d885f00e94dcd57
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a malicious redirector suggests an attempt to lure users to malicious sites, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious intent.

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=auto+format+visual+studio+c%2523
    • http://sinilip.nojbarker.com/uploads/1/3/1/6/131606289/pekok.pdf
    • http://files.kingsporthorses.com/uploads/1/3/1/6/131607374/014d297abc02d.pdf
    • http://files.libertydeafchurch.org/uploads/1/3/0/7/130738696/datogula_kebavuz.pdf
    • http://jibivos.carpetcleaningstpete.com/uploads/1/3/0/7/130738948/zikuvunowimabafasor.pdf
    • http://files.piercemadison.com/uploads/1/3/1/4/131437423/98f9d92b7a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6019/1651/files/tratamiento_para_candida_albicans.pdf
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/2131006345.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/converter_em_autocad_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4068/files/nololodasusipag.pdf
    • https://cdn.shopify.com/s/files/1/0434/1268/4967/files/xivewiwedubedoputube.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/4710288992.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/73463004075.pdf
    • https://cdn.shopify.com/s/files/1/0465/5012/2654/files/capping_beam_sheet_pile_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/24043390942.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e47.bin
b90b109c34db9b2d961be312c0c64f13ba4f5af9c83d6ae4556a72cb7f468167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E47 2880 bytes
font_01_sfnt_off00006885.bin
7a1a0f506d34dd217a39abb5fbd47e79fb662478beb594d08634808012152657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6885 5216 bytes
font_02_sfnt_off00007a2e.bin
ca9592c84c4bfe58826d3c94836682d4693cd9af9325f97b934ca1616fc1c98d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2E 12288 bytes
font_03_sfnt_off0000a146.bin
6746e5238264c3f7206b45ffeae26f3f10e7188f386a9109fed608d3c0b2c909		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA146 16524 bytes

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