Malicious PDF — malware analysis report

Static analysis result for SHA-256 177193ef2b295bbb…

MALICIOUS

PDF

49.2 KB Created: 2020-08-12 23:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac6810be29891560bee11f9b4b53f0ac SHA-1: 29146eb0bc2621bab62c05c7c3ff9a6cb23e8d13 SHA-256: 177193ef2b295bbbdfce6fda59ec7de8341e66299b9cbe725995acfdce7b9f60
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body itself contains a link to this redirector, suggesting an attempt to lure users to potentially harmful sites. 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=verbo+etre+avoir+pdf
    • http://files.rocksolidskilltraining.com/uploads/1/3/1/8/131856034/ac2e10ff.pdf
    • http://gowol.neurologysymposium.com/uploads/1/3/1/6/131607305/mepilo-tuzeluninisab-luzibebiwiboj-buzarajapasapuw.pdf
    • http://files.bennettfisher.net/uploads/1/3/2/3/132303314/c47dd.pdf
    • http://files.moirconstruction.co.uk/uploads/1/3/2/7/132741535/rikojabup-pisuzumenoguko.pdf
    • http://files.beckyalley.net/uploads/1/3/0/8/130873791/8398091.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/ielts_band_9_writing_task_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53978683100.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/wufizusazodewojinugexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5908/files/jisapawezenipevebew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0437/8551/9255/files/agnosia_visual_asociativa.pdf
    • https://cdn.shopify.com/s/files/1/0439/6960/9886/files/48612671071.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/l_alimentation_quilibre.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/94801621764.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/14214641077.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/dorics_quest_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/moxetekobujutib.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_off000057e4.bin
d0268685ce78443ef8f47be5a4b35a6ecaf793c925ad15bd2bd2ff5a9944c71e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E4 3184 bytes
font_01_sfnt_off0000633a.bin
6bb6e2cb27f8b26342f75ce822364a8b3597f7d93b823012eada3ef555712730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633A 4988 bytes
font_02_sfnt_off00007443.bin
22768d62399614e02a0bf2e251a50f18b97ce48c62535b3584b05479036e701b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7443 14760 bytes
font_03_sfnt_off0000a0f1.bin
ce90dcb8f80a691a226d66d7b9fb40db13b52946125f6d312f8860abae454107		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F1 16084 bytes

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