Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c740132f3f3192a…

MALICIOUS

PDF

48.9 KB Created: 2020-08-01 03:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fde6fe00a6bd3007e7de40372480988 SHA-1: 22d6244a6641abe0bc706c6389c05122d4f3c77b SHA-256: 0c740132f3f3192a9892090185371a2ac61b8566b4f40c94e4c5fe05e737b351
162 Risk Score

Malware Insights

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

The PDF contains a clear lure for a cracked game, directing users to a malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host numerous links, likely for SEO poisoning or to distribute further payloads. Although no scripts were directly extracted, the presence of embedded URLs and the redirector link point to a malicious workflow.

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.com/pify?keyword=pes+2013+crak
    • http://files.innerdolphinawakening.com/uploads/1/3/1/6/131606035/kumuvefajolen.pdf
    • http://files.earthtocolor.com/uploads/1/3/0/9/130969543/moxigilo_telimajobazel_pidivufowe.pdf
    • http://files.dogscantflush.org/uploads/1/3/1/8/131871390/suwizu_renuxetuf.pdf
    • http://files.ediblegroup.net/uploads/1/3/0/9/130968968/6f69189c5988.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/gojuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/62990477296.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/3702759548.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/30756099543.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/92494398627.pdf
    • https://cdn.shopify.com/s/files/1/0436/8809/9993/files/application_x-_www-_form-_urlencoded.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0434/3729/3718/files/8604835914.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/xikefafawi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/90540829087.pdf
    • https://cdn.shopify.com/s/files/1/0433/6615/4394/files/34851543704.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/modded_wii_u.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_off00005f91.bin
0327d54d46adbc8f057891aff75d05316c3a84c6c185637335fc828d5ca37644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F91 4760 bytes
font_01_sfnt_off00006fb6.bin
ed605af65441d9076fc9570e064d3e7211c33fc3f00787de904d259fa9f5c679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB6 10620 bytes
font_02_sfnt_off0000940e.bin
3b1167557c0500c78008053c404847a906c4d495ef15adec583fc97e76626070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x940E 16068 bytes
font_03_sfnt_off0000a8b0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B0 4324 bytes

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